Culpepper was placed on the 7-day injured list at Triple-A St. Paul on Tuesday with a left hip strain, Aaron Gleeman of AaronGleeman.com reports.
Culpepper had seemed close to getting a promotion to the big leagues, but that will have to wait now that he's been shelved. The 23-year-old has put up a .273/.377/.498 batting line with 14 home runs and 15 steals over 61 games with St. Paul this season.