Pence has been on the injured list with a right groin strain since June 17. On Monday, in the first game of his rehab assignment in Double-A Frisco, he aggravated the injury. He was running to first in his third at-bat when he felt the twinge.
An MRI Tuesday showed no new injury, but he was pulled from the rehab assignment.
Pence was named to his fourth All-Star Game last week in a season that has been a surprising turnaround for the 36-year-old.
He became a free agent after hitting .226 in his final season with the Giants and then got no big league offers. Pence signed a minor league deal with the Rangers and made the team after a good showing in spring training.
He's batting .294 with 15 home runs and 48 RBIs.