BALTIMORE -- Astros infielder Luis Valbuena had a setback with his strained right hamstring and was sent back to Houston to be reevaluated by team doctors.
Valbuena was working out in Baltimore with the hope he could begin a rehab assignment sometime during the current seven-game road trip.
However, Houston manager A.J. Hinch said Valbuena struggled to get through his latest workout Friday at Camden Yards. The hamstring had irritated Valbuena at a level the team had not seen in more than a week, and he was noticeably limping.
The more Valbuena rested and cooled down, the worse he felt, Hinch said.