No timetable for Adrian Beltre's return

ARLINGTON, Texas -- Texas Rangers third baseman Adrian Beltre, who has been sidelined with a strained left hamstring, has been cleared to continue lightly running the bases but a target date for his return is still unknown, the team said Monday.

Beltre ran at about 75 percent on Monday, going from home to first and rounding the bag, and Rangers physician Dr. Keith Meister didn't see any issues. There is no timetable for Beltre to go out on a rehab assignment or return to the lineup.

"I think it's going to be up to them," Beltre said about a possible return date. "Whatever they tell me to do, I don't really have a say in it. Running the bases at full speed and being able to manage it at game time [is the important thing]."

The AL's starting third baseman for this season's All-Star Game, Beltre was put on the disabled list July 23 and had a setback a few weeks ago when he re-aggravated the hamstring as he made the turn at first base.

"I would like to have him back as soon as we could," Rangers president and CEO Nolan Ryan told ESPN 103.3 FM's Galloway and Company on Monday. "Realistically, after pulling it the second time, I think we're looking at a longer period of time than we were on the first one.

"Could it be the first week of September? Yeah. Could it be the 15th of September? That's realistic, too. So I really don't know. ... We're going to have to kind of play it by ear, and obviously we're going to have to take more time this time than we took last time, because it jumped up and bit us this time."

Beltre has been doing a bunch of stretching and jogging exercises and has taken batting practice, but he has yet to test the hamstring at full speed. The Rangers would like for him to get a few games in on a rehab assignment, but the club doesn't want to rush the process.

Manager Ron Washington said Beltre wouldn't need as much time as most players to rehab and said if there aren't any minor league games for him to play in, he'll write him on the lineup card anyway.

"You're talking about a 13-year veteran," Washington said. "He'll just go out and we'll determine how many games we want him to play and he'll come back. Beltre missed spring training, came right off the DL and went out there and did it. That's what he does. We'll have to see him play a couple of games just to see he's fine, but we'll determine how many when he's ready to go."

Beltre is hitting .276 this season with 20 home runs and 76 RBIs for the AL West-leading Rangers. Michael Young has filled in at third base during Beltre's absence, hitting .368 in 106 at-bats when playing there this season.

Richard Durrett covers the Rangers for ESPNDallas.com.