Starlin Castro (strained right hamstring) went 1-for-3 with a single and a strikeout in a rehab start with Double-A Trenton on Thursday.
Castro was replaced in the seventh inning by a pinch-hitter. He batted second and play second base.
The plan is for Castro to play two rehab games for Trenton before joining the Yankees in Boston on Saturday, reports Don Amore of the Hartford Courant.
Castro was placed on the 10-day disabled list on June 27 due to the injury.
He suffered the injury against the White Sox on June 26, leaving the game in the third inning when he pulled up short trying to beat out a ground ball. Manager Joe Girardi and trainer Steve Donohue examined him on the field, and Castro limped off.
The 27-year-old Castro is hitting .313 with a .348 OBP and .486 SLG with 12 HR in 73 games for the Yankees this season.