The Pittsburgh Pirates placed right-fielder Gregory Polanco on the 10-day disabled list with a left hamstring strain on Saturday.
Polanco came up hobbling and left the game after the fourth inning of the Pirates' 13-5 win in Colorado on Friday.
He has been one of the keys to the Pirates' resurgence that has seen the team win 12 of 14 games and climb from eight games off the lead in the National League (NL) Central to two games back entering Saturday's action.
He has a .269 batting average with nine home runs this season.
Manager Clint Hurdle has several options to fill the gap in right-field, including John Jaso, Adam Frazier, and All-Star utility man Josh Harrison.
The Pirates also announced Saturday they had recalled left-hander Steven Brault from Triple-A Indianapolis.
The 25-year-old pitcher leads the International League with a 2.06 ERA.