Thompson (wrist) tossed 2.1 scoreless innings in his spring debut Thursday against the Orioles. He struck out two and did not walk a batter.
Thompson had been sidelined since camp began due to a wrist sprain. He suffered the injury when he fell during a workout right before reporting to spring training. The right-hander will open the regular season in the rotation at Triple-A Lehigh Valley, but should see time with the Phillies later this season.