SEATTLE -- Right-handed reliever Stephen Pryor, sidelined since mid-April with a torn muscle behind his throwing shoulder, threw a simulated inning against hitters Wednesday afternoon at Safeco Field as he continued working toward a midseason return.
Pryor, who is on the 60-day disabled list with a torn latissimus dorsi muscle, faced Michael Morse, Franklin Gutierrez and Dustin Ackley while throwing 25 pitches.
Manager Eric Wedge said the session went well and Pryor will throw another simulated outing on Saturday.
Pryor didn't allow a run in 7 1/3 innings in his first seven appearances this season before going on the disabled list.
Morse (strained quad) and Gutierrez (strained hamstring) are both on the 15-day disabled list themselves, but they aren't ready to go out on Minor League rehab outings yet and will remain with the team and likely hit against Pryor again Saturday.
Greg Johns is a reporter for MLB.com. Follow him on Twitter @GregJohnsMLB as well as his Mariners Musings blog. This story was not subject to the approval of Major League Baseball or its clubs.