Zimmerman has Grade 3 hamstring strain

Zimmerman has Grade 3 hamstring strain

MIAMI -- The Nationals have not announced the seriousness of Ryan Zimmerman's right hamstring injury, only indicating that the third baseman is not doing any activities to strengthen the hamstring. However, according to two baseball sources, Zimmerman has a Grade 3 hamstring strain, which means he could be out awhile.

The Nationals did not confirm the diagnosis. A Grade 3 hamstring strain is considered the most severe, involving a tear. Zimmerman, general manager Mike Rizzo and manager Matt Williams were unavailable for comment.

Zimmerman was placed on the 15-day disabled list last Wednesday after straining his hamstring while running to first base against the Rockies the previous day. Zimmerman was scheduled to see the doctor on Monday, but the Nationals have been mum on how he is doing.

"There is still no activity, so we may have something after the game, certainly [Tuesday] when we get here. We'll see what the doctor thinks," Williams said Monday. "He has a pulled hammy and he is not doing anything strength-wise at this point. So it's just kind of a checkup."

Williams had no new information to deliver on Tuesday.

It was learned last week that the Nationals inquired about Rangers third baseman Adrian Beltre, but "were rebuffed." It would come as a surprise if the club tried to acquire an infielder who is a difference-maker like Zimmerman.

Anthony Rendon has taken over as the starting third baseman. He has clearly been the team's MVP this season. But second base is shaky. Zach Walters, Danny Espinosa and Kevin Frandsen haven't proven to be everyday players.

It remains to be seen what the Nationals will do before the non-waiver Trade deadline, which is Thursday at 4 p.m. ET.

Bill Ladson is a reporter for MLB.com and writes an MLBlog, All Nats All the Time. He also can be found on Twitter @WashingNats. This story was not subject to the approval of Major League Baseball or its clubs.