Clemens, projected to start Game 3 of the American League Division Series against the Indians on Sunday at Yankee Stadium, arrived at 10:30 a.m. ET and appeared on the field just after noon.
With Yankees vice president of player personnel and pitching guru Billy Connors watching, Clemens began the session by long-tossing across the outfield for seven minutes with Yankees Minor League pitching coach Gil Patterson. Clemens unleashed 43 throws of varying distances, tossing up to 200 feet.
Clemens then stepped into the bullpen and threw 49 pitches in 14 minutes. With temperatures in the mid-80s, he finished the on-field portion of his workout by fielding 25 ground balls. Clemens left the complex 45 minutes later without speaking to reporters, driving out of the parking lot.
Clemens, 45, was scratched from his scheduled start against the Devil Rays last Tuesday because his left hamstring was not strong enough to hold up to pitching in a Major League game, especially covering bases on ground balls.
The right-handed Clemens, who went 6-6 with a 4.18 ERA in 18 games (17 starts) for the Yankees this season, made just two starts in an injury-plagued September. Clemens had two cortisone shots administered in his pitching elbow due to ligament damage, and he endured bleeding blisters in his right foot in addition to the hamstring injury, which he suffered while running on Sept. 20.
During the Yankees' late-September series with the Rays, Clemens indicated that he would be ready for his 12th postseason, his sixth as a member of the Yankees.
"I fully expect to be out there," Clemens said. "From where this team started and where we are now, it's been incredible. That's another reason why I'm happy for all these guys. For how the team started to now, a lot of guys should be proud of these guys."
Pete Williams is a contributor to MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.