Madson missed 12 games with a pectoral strain after last pitching on May 13, a game in which he picked up his first win of the season while tossing 1 1/3 innings against the Arizona Diamondbacks. He was given the option of taking a rehab stint in the minors but opted to return to the Nationals right away.
The 37-year-old has a 4.19 ERA through 21 appearances (19 1/3 innings) this season, going 1-2 with three saves in five chances, along with six holds. Madson went 3-0 with a 1.37 ERA in 19 2/3 innings with the Nationals last season after arriving via trade from the Oakland Athletics in July.
In his 13th season in the majors, Madson has a career ERA of 3.37 in 703 appearances for the Nationals, Athletics, Kansas City Royals and Philadelphia Phillies.
Washington optioned right-hander Trevor Gott to Triple-A Syracuse in a corresponding move.
Gott, 25, is 0-2 with a 5.28 ERA in 17 appearances (15 1/3 innings) this season.
He allowed 11 runs in just nine innings from 2016-17 with the Nationals after posting a 3.02 ERA with the Los Angeles Angels in 2015, his first season in the majors.
--Field Level Media