Texas Rangers outfielder Josh Hamilton will miss at least four weeks with a strained hamstring, according to a report from Fox Sports Southwest.
A separate report from Fox Sports noted that Hamilton sustained the injury while running the bases during Sunday's walk-off hit.
ESPN Radio Dallas reported Hamilton would go to the disabled list with a Grade 2 hamstring strain.
Hamilton sat out Tuesday and Wednesday's games against the Chicago White Sox. He had been activated off of the disabled list as recently as May 25 after spending the first two months of the season rehabbing a shoulder injury.
The injury is not only a setback for the Rangers, but marks a reversal of fortunes for Hamilton, who was just starting to turn things around after a tumultuous offseason.
In just seven games with the Rangers Hamilton had hit two home runs and had five RBI, including a two-RBI walk-off double during Sunday's come-from-behind win over the Boston Red Sox.
Hamilton reported himself to major league baseball before the start of the 2015 season after he suffered a relapse with cocaine. Hamilton has a history of drug abuse.
The Los Angeles Angels traded Hamilton earlier this season to the Rangers, the team he played for from 2008 until 2012.
- Will Green