McGowin (elbow) was outrighted to Triple-A Rochester on Friday, Jesse Dougherty of The Washington Post reports.
McGowin (elbow) will begin a rehab program after recently receiving an injection, Mark Zuckerman of MASNSports.com reports.
McGowin (elbow) was transferred to the 60-day injured list Saturday.
McGowin was placed on the 10-day injured list Friday with a UCL sprain in his right elbow, Maria Torres of The Athletic reports.
The Nationals reinstated McGowin (biceps) from the 10-day injured list Sunday, Mark Zuckerman of MASNSports.com reports.
McGowin (biceps) made a rehab appearance for Triple-A Rochester on Sunday, striking out two over a perfect inning.
McGowin was placed on the 10-day injured list Saturday with right biceps tendinitis, Jesse Dougherty of The Washington Post reports.
McGowin exited Saturday's game against the Giants after recording just two outs due to general fatigue, Justice delos Santos of MLB.com reports.
McGowin gave up a hit and struck out one in a scoreless inning of relief during Friday's loss to the Giants.
McGowin was recalled from Triple-A Rochester on Wednesday, Matt Weyrich of NBC Sports Washington reports.