James Paxton, the Seattle Mariners left-hander off to a strong start to the 2017 season, has been placed on the 10-day DL with a left forearm strain.
Paxton, who has battled injuries in the past, is 3-0 with a 1.43 ERA this season.
The move is retroactive to May 3, a day after Paxton allowed two runs (one earned) in five innings, walking six and striking out six.
In corresponding roster moves, Seattle recalled infielder Mike Freeman and right-hander Evan Marshall from Triple A. Outfielder Boog Powell also was optioned to the minors.