Transactions
| Date | Player | Transactions |
| 8/19 | Brian Dozier, 2B | Placed on Paternity Leave List |
| 8/19 | Adrián Sanchez, 3B | Called Up from Minors |
| 8/19 | Austin Voth, P | Sent to Minors For Rehabilitation |
| 8/18 | Sean Doolittle, P | Placed on 10-Day IL (Right knee tendinitis) |
| 8/18 | Kyle McGowin, P | Called Up from Minors |
| 8/18 | Jonny Venters, P | Recalled From Minors Rehab Assignment |
| 8/18 | Austen Williams, P | Recalled From Minors Rehab Assignment |
| 8/16 | Ryan Zimmerman, 1B | Sent to Minors For Rehabilitation |
| 8/12 | Greg Holland, P | Signed to a Minor League Contract |
| 8/12 | Howie Kendrick, 2B | Removed From 10-Day IL (Strained left hamstring) |
| 8/12 | Andrew Stevenson, LF | Sent to Minors |
| 8/8 | Tony Sipp, P | Cleared Waivers and Became a Free Agent |
| 8/7 | Jeremy Hellickson, P | Sent to Minors For Rehabilitation |
| 8/6 | Kyle Barraclough, P | Designated for Assignment |
| 8/6 | Asdrúbal Cabrera, SS | Signed as Free Agent ( 2019)(one-year contract) |
| 8/6 | Adrián Sanchez, 3B | Sent to Minors |
| 8/6 | Tony Sipp, P | Released |
| 8/4 | Brad Boxberger, P | Released |
| 8/4 | Roenis Elías, P | Placed on 10-Day IL (Strained right hamstring) |
| 8/4 | Javy Guerra, P | Purchased From Minors |
| 8/4 | Howie Kendrick, 2B | Placed on 10-Day IL (Strained left hamstring) |
| 8/4 | T.J. Rivera, 3B | Signed to a Minor League Contract |
| 8/4 | Andrew Stevenson, LF | Called Up from Minors |
| 8/3 | Michael Blazek, P | Outrighted to Minors |
| 8/3 | Javy Guerra, P | Outrighted to Minors |
| 8/2 | Tony Sipp, P | Designated for Assignment |
| 8/1 | Justin Miller, P | Outrighted to Minors |
| 7/31 | Michael Blazek, P | Designated for Assignment |
| 7/31 | Roenis Elías, P | Traded Seattle (w/P Hunter Strickland, five-player deal) |
| 7/31 | Javy Guerra, P | Designated for Assignment |
| 7/31 | Daniel Hudson, P | Traded Toronto (for RHP Kyle Johnston) |
| 7/31 | Hunter Strickland, P | Traded Seattle (with LHP Roenis Elias, five-player deal) |
| 7/31 | Jonny Venters, P | Transferred to 60-Day IL (Strained left shoulder) |
| 7/29 | Erick Fedde, P | Called Up from Minors |
| 7/29 | Justin Miller, P | Recalled From Minors Rehab Assignment |
| 7/29 | Justin Miller, P | Removed From 60-Day IL (Strained right rotator cuff) |
| 7/29 | Justin Miller, P | Designated for Assignment |
| 7/29 | Max Scherzer, P | Placed on 10-Day IL (Mild rhomboid strain) |
| 7/27 | Adrián Sanchez, 3B | Called Up from Minors |
| 7/26 | Kyle Barraclough, P | Called Up from Minors |
| 7/26 | Kyle Barraclough, P | Sent to Minors |
| 7/26 | Andrew Stevenson, LF | Sent to Minors |
| 7/25 | Raudy Read, C | Sent to Minors |
| 7/25 | Adrián Sanchez, 3B | Return of 26th man |
| 7/25 | Max Scherzer, P | Removed From 10-Day IL (Inflamed bursa sac in back/shoulder) |
| 7/24 | Erick Fedde, P | Sent to Minors |
| 7/24 | Raudy Read, C | Called Up from Minors |
| 7/24 | Adrián Sanchez, 3B | Called Up from Minors (recalled as 26th roster player) |
| 7/23 | Jonny Venters, P | Sent to Minors For Rehabilitation |
| 7/23 | Austen Williams, P | Sent to Minors For Rehabilitation |
| 7/22 | Michael Blazek, P | Purchased From Minors |
| 7/22 | Kyle McGowin, P | Sent to Minors |
| 7/22 | Justin Miller, P | Transferred to 60-Day IL (Strained right rotator cuff) |
| 7/22 | Andrew Stevenson, LF | Called Up from Minors |
| 7/22 | Ryan Zimmerman, 1B | Placed on 10-Day IL (Plantar fasciitis, right foot) |
| 7/21 | Joe Ross, P | Called Up from Minors |
| 7/21 | Austin Voth, P | Placed on 10-Day IL (Right biceps tendinitis) |
| 7/17 | Erick Fedde, P | Called Up from Minors |
| 7/17 | Adrián Sanchez, 3B | Sent to Minors |
| 7/16 | Spencer Kieboom, C | Sent to Minors |
| 7/16 | Austin Voth, P | Called Up from Minors |
| 7/13 | Spencer Kieboom, C | Called Up from Minors |
| 7/13 | Max Scherzer, P | Placed on 10-Day IL (Inflamed bursa sac in back/shoulder) |
| 7/12 | Brad Boxberger, P | Signed to a Minor League Contract |
| 7/12 | Kyle McGowin, P | Called Up from Minors |
| 7/11 | Jonny Venters, P | Placed on 10-Day IL (Strained left shoulder) |
| 7/9 | Kyle Barraclough, P | Recalled From Minors Rehab Assignment |
| 7/9 | Kyle Barraclough, P | Removed From 10-Day IL (Right radial nerve irritation) |
| 7/9 | Kyle Barraclough, P | Sent to Minors |
| 7/6 | Max Scherzer, P | Reinstated from Paternity Leave List |
| 7/6 | Austin Voth, P | Sent to Minors |
| 7/4 | Kyle Barraclough, P | Sent to Minors For Rehabilitation |
| 7/4 | Justin Miller, P | Sent to Minors For Rehabilitation |
| 7/3 | Adrián Sanchez, 3B | Called Up from Minors |
| 7/3 | Max Scherzer, P | Placed on Paternity Leave List |
| 6/28 | Ryan Zimmerman, 1B | Recalled From Minors Rehab Assignment |
| 6/28 | Ryan Zimmerman, 1B | Removed From 10-Day IL (Plantar fasciitis, right foot) |
| 6/27 | Michael A. Taylor, CF | Sent to Minors |
| 6/25 | Jeremy Hellickson, P | Transferred to 60-Day IL (Right shoulder tendinitis) |
| 6/25 | Kyle McGowin, P | Sent to Minors |
| 6/25 | Fernando Rodney, P | Purchased From Minors |
| 6/25 | Trevor Rosenthal, P | Cleared Waivers and Became a Free Agent |
| 6/25 | Jonny Venters, P | Purchased From Minors |
| 6/23 | Erick Fedde, P | Sent to Minors |
| 6/23 | Kyle McGowin, P | Called Up from Minors |
| 6/23 | Trevor Rosenthal, P | Released |
| 6/23 | Joe Ross, P | Sent to Minors |
| 6/23 | Austin Voth, P | Called Up from Minors |
| 6/21 | Joe Ross, P | Called Up from Minors |
| 6/21 | Adrián Sanchez, 3B | Sent to Minors |
| 6/21 | Ryan Zimmerman, 1B | Sent to Minors For Rehabilitation |
| 6/19 | Austin Voth, P | Called Up from Minors (recalled as 26th roster player) |
| 6/19 | Austin Voth, P | Return of 26th man |
| 6/16 | Kyle Barraclough, P | Placed on 10-Day IL (Right radial nerve irritation) |
| 6/16 | Adrián Sanchez, 3B | Called Up from Minors |
| 6/9 | Justin Miller, P | Recalled From Minors Rehab Assignment |
| 6/8 | Kyle McGowin, P | Sent to Minors |
| 6/8 | Justin Miller, P | Sent to Minors For Rehabilitation |
| 6/8 | Trevor Rosenthal, P | Removed From 10-Day IL (Viral infection) |
| 6/8 | Trevor Rosenthal, P | Recalled From Minors Rehab Assignment |
| 6/1 | Fernando Rodney, P | Signed to a Minor League Contract |
| 5/29 | James Bourque, P | Sent to Minors |
| 5/29 | Aníbal Sánchez, P | Removed From 10-Day IL (Strained left hamstring) |
| 5/29 | Jonny Venters, P | Signed to a Minor League Contract |
| 5/27 | Vidal Nuño III, P | Released |
| 5/25 | James Bourque, P | Called Up from Minors |
| 5/25 | George Kontos, P | Signed to a Minor League Contract |
| 5/25 | Joe Ross, P | Sent to Minors |
| 5/25 | Andrew Stevenson, LF | Recalled From Minors Rehab Assignment |
| 5/25 | Andrew Stevenson, LF | Removed From 10-Day IL (Back spasms) |
| 5/25 | Andrew Stevenson, LF | Sent to Minors |
| 5/22 | Matt Adams, 1B | Removed From 10-Day IL (Left shoulder strain) |
| 5/22 | Dan Jennings, P | Declared Free Agency |
| 5/22 | Dan Jennings, P | Outrighted to Minors |
| 5/22 | Adrián Sanchez, 3B | Sent to Minors |
| 5/21 | Jeremy Hellickson, P | Placed on 10-Day IL (Right shoulder tendinitis) |
| 5/21 | Kevin McGowan, P | Signed to a Minor League Contract |
| 5/20 | Javy Guerra, P | Acquired Off Waivers Toronto |
| 5/20 | Dan Jennings, P | Designated for Assignment |
| 5/20 | Tony Sipp, P | Recalled From Minors Rehab Assignment |
| 5/20 | Tony Sipp, P | Removed From 10-Day IL (Strained oblique) |
| 5/20 | Andrew Stevenson, LF | Sent to Minors For Rehabilitation |
| 5/18 | Justin Miller, P | Placed on 10-Day IL (Strained right rotator cuff) |
| 5/18 | Tanner Rainey, P | Called Up from Minors |
| 5/18 | Tony Sipp, P | Sent to Minors For Rehabilitation |
| 5/17 | Wilmer Difo, SS | Sent to Minors |
| 5/17 | Kyle McGowin, P | Called Up from Minors |
| 5/17 | Aníbal Sánchez, P | Placed on 10-Day IL (Strained left hamstring) |
| 5/17 | Trea Turner, SS | Recalled From Minors Rehab Assignment |
| 5/17 | Trea Turner, SS | Removed From 10-Day IL (Broken right index finger) |
| 5/14 | Trea Turner, SS | Sent to Minors For Rehabilitation |
| 5/13 | Michael Blazek, P | Signed to a Minor League Contract |
| 5/11 | Jake Noll, 3B | Sent to Minors |
| 5/11 | Trevor Rosenthal, P | Sent to Minors For Rehabilitation |
| 5/11 | Juan Soto, LF | Removed From 10-Day IL (Back spasms) |
| 5/9 | Jimmy Cordero, P | Designated for Assignment |
| 5/9 | Gerardo Parra, CF | Signed as Free Agent ( 2019)(one-year contract) |
| 5/9 | Andrew Stevenson, LF | Placed on 10-Day IL (Back spasms) |
| 5/7 | Erick Fedde, P | Called Up from Minors |
| 5/7 | Carter Kieboom, SS | Sent to Minors |
| 5/7 | Anthony Rendon, 3B | Removed From 10-Day IL (Left elbow contusion) |
| 5/7 | Tony Sipp, P | Placed on 10-Day IL (Strained oblique) |
| 5/5 | Matt Adams, 1B | Placed on 10-Day IL (Left shoulder strain) |
| 5/5 | Jake Noll, 3B | Called Up from Minors |
| 5/4 | Juan Soto, LF | Placed on 10-Day IL (Back spasms) |
| 5/4 | Andrew Stevenson, LF | Called Up from Minors |
| 4/30 | Austin Adams, P | Designated for Assignment |
| 4/30 | Dan Jennings, P | Purchased From Minors |
| 4/30 | Anthony Rendon, 3B | Placed on 10-Day IL (Left elbow contusion) |
| 4/29 | Erick Fedde, P | Sent to Minors |
| 4/29 | Adrián Sanchez, 3B | Called Up from Minors |
| 4/28 | Erick Fedde, P | Called Up from Minors |
| 4/28 | Ryan Zimmerman, 1B | Placed on 10-Day IL (Plantar fasciitis, right foot) |
| 4/26 | Koda Glover, P | Transferred to 60-Day IL (Strained right forearm) |
| 4/26 | Carter Kieboom, SS | Purchased From Minors |
| 4/26 | Justin Miller, P | Recalled From Minors Rehab Assignment |
| 4/26 | Justin Miller, P | Removed From 10-Day IL (Lower back strain) |
| 4/26 | Trevor Rosenthal, P | Placed on 10-Day IL (Viral infection) |
| 4/24 | Justin Miller, P | Sent to Minors For Rehabilitation |
| 4/24 | Jake Noll, 3B | Sent to Minors |
| 4/22 | Austin Adams, P | Sent to Minors |
| 4/22 | Jake Noll, 3B | Called Up from Minors |
| 4/19 | Austin Adams, P | Called Up from Minors |
| 4/19 | Austen Williams, P | Placed on 10-Day IL (Sprained AC joint, right shoulder) |
| 4/15 | Dan Jennings, P | Signed to a Minor League Contract |
| 4/13 | Justin Miller, P | Placed on 10-Day IL (Lower back strain) |
| 4/13 | Austen Williams, P | Called Up from Minors |
| 4/8 | Andrew Stevenson, LF | Sent to Minors |
| 4/8 | Michael A. Taylor, CF | Recalled From Minors Rehab Assignment |
| 4/8 | Michael A. Taylor, CF | Removed From 10-Day IL (Sprained left knee/hip) |
| 4/7 | Joe Ross, P | Called Up from Minors |
| 4/7 | Adrián Sanchez, 3B | Sent to Minors |
| 4/4 | Howie Kendrick, 2B | Removed From 10-Day IL (Strained left hamstring) |
| 4/4 | Michael A. Taylor, CF | Sent to Minors For Rehabilitation |
| 4/3 | Jake Noll, 3B | Sent to Minors |
| 4/3 | Adrián Sanchez, 3B | Called Up from Minors |
| 4/3 | Trea Turner, SS | Placed on 10-Day IL (Broken right index finger) |
| 3/27 | Koda Glover, P | Placed on 10-Day IL (Strained right forearm) |
| 3/27 | Howie Kendrick, 2B | Placed on 10-Day IL (Strained left hamstring) |
| 3/27 | Jake Noll, 3B | Purchased From Minors |
| 3/27 | Michael A. Taylor, CF | Placed on 10-Day IL (Sprained left knee/hip) |
| 3/25 | Adrián Sanchez, 3B | Sent to Minors |
| 3/25 | Austen Williams, P | Sent to Minors |
| 3/23 | Erick Fedde, P | Sent to Minors |
| 3/23 | Spencer Kieboom, C | Sent to Minors |
| 3/23 | Joe Ross, P | Sent to Minors |
| 3/18 | Jimmy Cordero, P | Sent to Minors |
| 3/18 | Kyle McGowin, P | Sent to Minors |
| 3/18 | Tanner Rainey, P | Sent to Minors |
| 3/18 | Austin Voth, P | Sent to Minors |
| 3/14 | Chris Domínguez, 3B | Signed to a Minor League Contract |
| 3/14 | Tony Sipp, P | Signed as Free Agent ( 2019; Opt 2020)(one-year contract) |
| 3/13 | Austin Adams, P | Sent to Minors |
| 3/11 | Sammy Solís, P | Cleared Waivers and Became a Free Agent |
| 3/9 | Sammy Solís, P | Released |
| 3/8 | James Bourque, P | Sent to Minors |
| 3/8 | Raudy Read, C | Sent to Minors |
| 2/23 | Collin Cowgill, RF | Signed to a Minor League Contract |
| 2/23 | O'Koyea Dickson, LF | Signed to a Minor League Contract |
| 2/13 | Scott Copeland, P | Signed to a Minor League Contract |
| 2/8 | Kyle Barraclough, P | Signed ( 2019)(loses arbitration) |
| 2/8 | Trevor Gott, P | Designated for Assignment |
| 2/8 | Jeremy Hellickson, P | Signed as Free Agent ( 2019)(one-year contract) |
| 2/7 | Logan Ondrusek, P | Signed to a Minor League Contract |
| 2/1 | J.J. Hoover, P | Signed to a Minor League Contract |
| 2/1 | Michael A. Taylor, CF | Signed ( 2019)(loses arbitration) |
| 1/23 | Tyler Goeddel, LF | Signed to a Minor League Contract |
| 1/23 | Luis Sardiñas, SS | Signed to a Minor League Contract |
| 1/18 | Vidal Nuño III, P | Signed to a Minor League Contract |
| 1/17 | Matt Reynolds, 2B | Outrighted to Minors |
| 1/16 | Paolo Espino, P | Signed to a Minor League Contract |
| 1/13 | Brian Dozier, 2B | Signed as Free Agent ( 2019)(one-year contract) |
| 1/13 | Matt Reynolds, 2B | Designated for Assignment |
| 1/11 | Anthony Rendon, 3B | Signed ( 2019)(avoids arbitration) |
| 1/11 | Trea Turner, SS | Signed ( 2019)(avoids arbitration) |
| 1/10 | Joe Ross, P | Signed ( 2019)(avoids arbitration) |
| 1/9 | Brandon Snyder, 3B | Signed to a Minor League Contract |
| 12/28 | Aníbal Sánchez, P | Signed as Free Agent ( 2019-2020; Opt 2021)(two-year contract) |
| 12/18 | Matt Adams, 1B | Signed as Free Agent ( 2019; Opt 2020)(one-year contract) |
| 12/12 | Tanner Rainey, P | Traded Cincinnati (for RHP Tanner Roark) |
| 12/7 | Patrick Corbin, P | Signed as Free Agent ( 2019-2024)(six-year contract) |
| 11/30 | Yan Gomes, C | Traded Cleveland (for OF Daniel Johnson, four-player deal) |
| 11/30 | Sammy Solís, P | Signed ( 2019)(avoids arbitration) |
| 11/26 | Henderson Alvarez III, P | Signed to a Minor League Contract |
| 11/20 | Kurt Suzuki, C | Signed as Free Agent ( 2019-2020)(two-year contract) |
| 11/19 | James Bourque, P | Purchased From Minors |
| 11/7 | Trevor Rosenthal, P | Signed as Free Agent ( 2019; Opt 2020)(one-year contract) |
| 11/2 | Logan Darnell, P | Declared Free Agency |
| 11/2 | Chris Domínguez, 3B | Declared Free Agency |
| 11/2 | Irving Falú, 2B | Declared Free Agency |
| 11/2 | David Goforth, P | Declared Free Agency |
| 11/2 | Tuffy Gosewisch, C | Declared Free Agency |
| 11/2 | Bryce Harper, RF | Tendered Qualifying Offer (declined) |
| 11/2 | Román Méndez, P | Declared Free Agency |
| 11/2 | Christopher Smith, P | Declared Free Agency |
| 11/2 | César Vargas, P | Declared Free Agency |
| 11/1 | Jhonatan Solano, C | Removed From 60-Day DL (Bone spurs in right elbow) |
| 11/1 | Jhonatan Solano, C | Refused Minor League Assignment - Free Agent |
| 11/1 | Jhonatan Solano, C | Outrighted to Minors |
| 10/29 | Joaquin Benoit, P | Removed From 60-Day DL (Strained right forearm) |
| 10/29 | Joaquin Benoit, P | Declared Free Agency |
| 10/29 | Tim Collins, P | Declared Free Agency |
| 10/29 | Sean Doolittle, P | Signed ( 2019)(team option exercised) |
| 10/29 | Bryce Harper, RF | Declared Free Agency |
| 10/29 | Jeremy Hellickson, P | Declared Free Agency |
| 10/29 | Kelvin Herrera, P | Declared Free Agency |
| 10/29 | Greg Holland, P | Declared Free Agency |
| 10/29 | Howie Kendrick, 2B | Removed From 60-Day DL (Torn right Achilles) |
| 10/29 | Mark Reynolds, 1B | Declared Free Agency |
| 10/29 | Matt Wieters, C | Declared Free Agency |
| 10/10 | Kyle Barraclough, P | Traded Miami (for international slot money) |
| 10/1 | Austin Adams, P | Called Up from Minors - Not to Report |
| 10/1 | Trevor Gott, P | Called Up from Minors - Not to Report |
| 10/1 | Kelvin Herrera, P | Removed From 10-Day DL (Torn Lisfranc ligament in left foot) |
| 10/1 | Tommy Milone, P | Declared Free Agency |
| 10/1 | Raudy Read, C | Called Up from Minors - Not to Report |
| 10/1 | Matt Reynolds, 2B | Called Up from Minors - Not to Report |
| 10/1 | Moisés Sierra, RF | Refused Minor League Assignment - Free Agent |
| 10/1 | Carlos Torres, P | Declared Free Agency |
Last updated Aug. 21, 12:12 A.M. ET
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