Hart (shoulder) will begin a rehab assignment with Triple-A Indianapolis on Tuesday, Stephen J. Nesbitt of the Pittsburgh Post-Gazette reports. A shoulder impingement put Hart on the shelf, but the fact that he's ready to start up with minor league games less than a week after landing on the DL bodes well for his chances of returning shortly after his 15 days are up. Hart has been used sparingly this season, however, totaling just 54 at-bats in 35 games to this point.