10:56 AM - Mason Thompson (WSH) Nationals placed Thompson (elbow) on the 60-day injured list Sunday.

10:13 AM - Mason Thompson (WSH) will undergo Tommy John surgery on his right elbow Friday, Mark Zuckerman of MASNSports.com reports.

2:56 PM - Mason Thompson (WSH) will have his elbow re-evaluated early this week, Mark Zuckerman of MASN Sports reports.

1:47 PM - Mason Thompson (WSH) Nationals announced Wednesday that Thompson is dealing with an elbow injury and will be shut down from throwing for at least the next two weeks, Mark Zuckerman of MASNSports.com reports.

3:34 PM - Mason Thompson (WSH) optioned Thompson to Triple-A Rochester on Wednesday.

3:51 PM - Mason Thompson (WSH) (knee) was reinstated from the 15-day injured list Sunday, Andrew Golden of The Washington Post reports.

5:29 PM - Mason Thompson (WSH) (knee) will head to Double-A Harrisburg later this week to begin a rehab assignment, Andrew Golden of The Washington Post reports.

5:14 PM - Mason Thompson (WSH) (knee) threw 25 pitches in a simulated appearance Tuesday, Andrew Golden of The Washington Post reports.

2:26 PM - Mason Thompson (WSH) was placed on the 15-day injured list Saturday with a left knee contusion, Mark Zuckerman of MASNSports.com reports.

10:01 AM - Mason Thompson (WSH) gave up two hits and struck out one in 1.1 scoreless innings to record his ninth hold of the season in Monday's win over the Cubs.

10:35 AM - Mason Thompson (WSH) gave up two hits and struck out two in a scoreless sixth inning Friday to record his third hold of the season in a loss to Atlanta.

11:24 AM - Mason Thompson (WSH) (1-1) gave up one hit in a scoreless eighth inning Sunday to record the win against the Guardians. He didn't walk or strike out a batter.

9:52 AM - Mason Thompson (WSH) gave up one hit and struck out three over two scoreless innings of relief in an Opening Day loss to Atlanta.

1:28 PM - Mason Thompson (WSH) could see high-leverage work for the Nationals this season, potentially even in the ninth inning with manager Dave Martinez suggesting he'll use Kyle Finnegan as a fireman and not a traditional closer, Bobby Blanco of MASN reports.

10:39 PM - Mason Thompson (WSH) allowed one hit over three shutout innings against the Cardinals on Monday. He struck out one and earned a save.

10:39 PM - Mason Thompson (WSH) allowed one hit over three shutout innings against the Cardinals on Monday. He struck out one and earned a save.

1:40 PM - Mason Thompson (WSH) Nationals recalled Thompson from Triple-A Rochester on Thursday, Jessica Camerato of MLB.com reports.

8:36 PM - Mason Thompson (WSH) was optioned to Triple-A Rochester on Wednesday, Mark Zuckerman of MASNSports.com reports.

8:36 PM - Mason Thompson (WSH) was optioned to Triple-A Rochester on Wednesday, Mark Zuckerman of MASNSports.com reports.

12:56 PM - Mason Thompson (WSH) Nationals recalled Thompson from Triple-A Rochester ahead of Sunday's game in Philadelphia, Bobby Blanco of MASNSports.com reports.

12:56 PM - Mason Thompson (WSH) Nationals recalled Thompson from Triple-A Rochester ahead of Sunday's game in Philadelphia, Bobby Blanco of MASNSports.com reports.

3:20 PM - Mason Thompson (WSH) was optioned to Triple-A Rochester by the Nationals on Thursday.

2:54 PM - Mason Thompson (WSH) (biceps) is back with the team and will be activated from the 60-day injured list Friday, Matt Weyrich of NBC Sports Washington reports.

12:08 PM - Mason Thompson (WSH) (biceps) struck out two and allowed one hit and no walks over a scoreless inning in his rehab appearance Monday for the Nationals' rookie-level Florida Complex League affiliate.

4:36 PM - Mason Thompson (WSH) (biceps) threw live batting practice Saturday, Jessica Camerato of MLB.com reports.

2:38 PM - Mason Thompson (WSH) (biceps) has resumed throwing bullpen sessions, Byron Kerr of MLB.com reports.

3:06 PM - Mason Thompson (WSH) Nationals transferred Thompson (biceps) from the 10-day injured list to the 60-day IL on Tuesday.

5:56 PM - Mason Thompson (WSH) who was placed on the 10-day injured list earlier Sunday, was diagnosed with right biceps tendinitis after undergoing an MRI, Jessica Camerato of MLB.com reports.

11:22 AM - Mason Thompson (WSH) was placed on the 10-day injured list Sunday.

11:00 AM - Mason Thompson (WSH) walked one batter, hit another with a pitch and struck out three in a scoreless inning during Thursday's loss to the Mets.

11:27 AM - Mason Thompson (WSH) worked 1.1 scoreless innings in Tuesday's Grapefruit League finale against the Mets, allowing one walk and striking out two. He also threw a wild pitch.

11:28 PM - Mason Thompson (WSH) (1-3) failed to record an out, yielding two runs on a hit, a hit batter and a walk to take the loss versus Colorado on Wednesday.

3:56 PM - Mason Thompson (WSH) was added to the Nationals' 26-man roster Saturday and will be available to pitch against the Cubs, Mark Zuckerman of MASNSports.com reports.

10:12 AM - Mason Thompson (WSH) is expected to join the major-league roster Saturday, Jesse Dougherty of The Washington Post reports.