Manager Aaron Boone said Friday that Berti was left off the Yankees' World Series roster due to a right hip flexor injury, Bryan Hoch of MLB.com reports.

Berti is not on the Yankees' World Series roster.

Berti is starting at first base and batting ninth Thursday in Game 4 of the ALDS in Kansas City, Jack Curry of YES Network reports.

Berti is starting at first base and batting ninth Monday in Game 2 of the ALDS against the Royals.

Berti went 2-for-4 with a stolen base in Saturday's win over Oakland. He was also hit by a pitch.

The Yankees reinstated Berti (calf) from the 60-day injured list Monday.

Berti (calf) went 2-for-3 with a three-run home run in an minor-league game with Double-A Somerset on Saturday.

Yankees manager Aaron Boone said that Berti (calf) is expected to begin a rehab assignment Friday with Double-A Somerset, Gary Phillips of the New York Daily News reports.

Berti (calf) has been cleared for full baseball activity and could begin a minor-league rehab assignment next week, per MLB.com.

Berti (calf) has increased his running intensity to 80 percent, and Yankees manager Aaron Boone said Saturday that the utility man is "trending back in a good direction," per MLB.com.