DETROIT -- Alex Rodriguez completed his first injury rehabilitation workout on Friday at the Yankees' Minor League complex in Tampa, Fla., taking batting practice and fielding ground balls at third base.
Rodriguez took 57 swings and fielded 31 balls, according to The Associated Press. He had resumed similar activities at Yankee Stadium on Wednesday before leaving for Tampa on Thursday, eyeing an MRI early next week that would permit him to begin a rehabilitation assignment in extended spring training action.
According to the AP, Rodriguez hit several long homers, including a pair that went over the center-field backdrop. He also ran in the outfield. Rodriguez said the session went "good" and gave a thumbs-up as he left the field for the clubhouse.
Yankees manager Joe Girardi said that Rodriguez is scheduled to have a MRI on Monday morning and could begin a two-game Minor League rehabilitation stint on Tuesday in extended spring training. The earliest he could be activated by New York would be on Thursday against the Rays at St. Petersburg.
"We'll have to talk to the doctors and see where he's at," Girardi said. "Personally, I would like to see him sprint before he plays a game. It's that quick start. ... He's got to feel comfortable and we've got to feel comfortable with his leg before we bring him back."
Rodriguez was placed on the 15-day disabled list on April 30 with a Grade 2 strain of his right quadriceps, an injury he originally sustained while running out a ground ball on April 20 at Baltimore, and he aggravated it when he returned to the lineup after missing three games.
In other injury updates, catcher Jorge Posada took batting practice for the first time since going on the DL on April 28 with right rotator cuff tendinitis. The switch-hitter took 28 swings right-handed and 26 from the left side, according to the AP. Posada is expected to be out at least another month, but could start a light throwing program early next week.
Right-hander Jeff Karstens, sidelined since straining his right groin March 27, could pitch in an extended spring training game on Saturday. He was the front-runner to win a long-relief roster spot before getting hurt in his last scheduled spring appearance.
Bryan Hoch is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.