The 25-year-old has been dealing with shoulder issues since straining his left lat muscle in his second start on April 8 against the Angels. He worked his way through the rehab process once already, but then was shut down again after more soreness cropped up following a three-inning start for Triple-A Tacoma in late May.
"Everything feels good," Paxton said after throwing all his pitches during Saturday's workout. "It's just one step at a time in getting my stuff back to where it needs to be to pitch here. But I think with a couple rehab starts and a little more refinement and a couple [bullpen sessions], it'll be good to go."
Everett hosts Salem-Keizer on Thursday at 7:05 p.m. PT, and Paxton lines up for that start, while Taijuan Walker is scheduled to throw the same day for Tacoma at Reno before he rejoins Seattle's rotation following the All-Star break.
"It'll be fun to get in game situations again and face some different-colored jerseys," said Paxton, who likely will throw three innings if all goes well.
Paxton is 2-0 with a 2.25 ERA in two starts this season, and 5-0 with a 1.75 ERA in six starts for Seattle since making his Major League debut last September.
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.