ALLEN PARK -- Detroit Lions running back Mike Leshoure was absent from another day of organized team activities (OTAs) because of a nagging hamstring injury.

Leshoure has missed the past two weeks of OTAs due to his latest setback. Lions coach Jim Schwartz did not express major concern about Leshoure's hamstring, but said the injury has not healed as fast as he hoped.

"It's something that's been nagging him," Schwartz said. "He's got a little bit of a hamstring. We'll get him back as soon as we can. This time of year, we don't want to really push anybody, push them on the field, and set them back even further. It's taken him a little bit longer than we would have thought, but that's why we don't put timetables on those things.

"We'll get him back here soon. He's working hard. He's just not working on the field."

Detroit's former second-round pick has been plagued with injuries since entering the NFL.

Leshoure missed the 2011 season due to a Achilles injury. He sustained a hamstring injury and missed most of last year's training camp. Leshoure rebounded to have 14 starts last year, and finished with 798 rushing yards and nine touchdowns. However, Leshoure had three fumbles, and his longest run from scrimmage was 16 yards.

Schwartz would not attribute Leshoure's current ailment with the previous Achilles injury.

"It's really hard to say how much the Achilles had to play because the Achilles never really made it onto the radar," Schwartz said. "I think we've seen in a lot of different cases when a guy comes back from a major injury, we see it sometimes with ACLs, when they were coming back from the ACL, maybe they get a hamstring or an ankle or a groin or something like that. It's possible that could have been one of the cases with him last year. He had times when he played very, very well for us. He wasn't consistent enough over the course of a season.

"Again, whether that's injuries, whether that's basically being a rookie and learning how to be consistent week-to-week, those are things on his plate this offseason. He has been setback a little bit. He has nothing that's going to hold him back long-term, but this time of year we always want to be careful with everybody and try not to push anybody back too quickly."

Lions safety Louis Delmas was not at today's practice, while defensive end Devin Taylor (hamstring), cornerback Darius Slay (knee), receiver Ryan Broyles (ACL), receiver Brian Robiskie (undisclosed), running back Jahvid Best (concussion) and receiver Corey Fuller (undisclosed) did not participate.