Ryan Zimmerman 3B/LF WAS 2 Days

There is no timetable for Zimmerman (hamstring) to begin baseball activities, MLB.com's Bill Ladson and Daniel Popper report.

He's been out almost a month with the Grade 3 hamstring strain, and the only thing he has done in terms or recovery is to work on an underwater treadmill. He can walk normally, but he still can't do much else, and at this point, owners should probably look elsewhere for production at third base in single-season leagues. Anthony Rendon will continue to man the hot corner with Asdrubal Cabrera and Danny Espinosa taking turns at second base.

Ryan Zimmerman 3B/LF WAS 7 Days

Zimmerman has begun a strengthening program on his injured hamstring, MLB Network Radio reports.

Zimmerman has not encountered any hiccups in his recovery just yet, but he will remain sidelined for several more weeks, and is not expected to resume playing until sometime in September.

Ryan Zimmerman 3B/LF WAS 15 Days

Zimmerman (hamstring) is expected to miss six weeks, Adam Kilgore of the Washington Post reports.

An extended absence was expected after Zimmerman was diagnosed with a Grade 3 hamstring strain, but GM Mike Rizzo offered up a six-week timetable Tuesday. The 29-year-old took the first step in his recovery Monday, walking on an underwater treadmill, and he'll now advance gradually with an eye toward returning in mid-September.

Ryan Zimmerman 3B/LF WAS 15 Days

Zimmerman walked on an underwater treadmill Monday and his hamstring felt fine, according to manager Matt Williams, Mark Zuckerman of CSNWashington.com reports.

While it may not sound like much, Monday's activity represents a positive first step for Zimmerman in his rehabilitation from a Grade 3 hamstring strain. The Nationals will bring him along slowly, and it sounds like Zimmerman will likely miss most of the regular season, but perhaps he can make it back in time for a postseason run. Anthony Rendon will continue to occupy third base in his absence, with deadline acquisition Asdrubal Cabrera manning second.

Ryan Zimmerman 3B/LF WAS 25 Days

Ken Rosenthal of FOX Sports reports that Ryan Zimmerman (hamstring) is expected to miss 6-8 weeks.

While the team could look to add a second baseman, they'll roll in the interim with a combination of Danny Espinosa and Zach Walters with Anthony Rendon sliding over to cover third base.

Ryan Zimmerman 3B/LF WAS 28 Days

Nationals manager Matt Williams said the MRI results for Ryan Zimmerman showed a "pretty substantial" hamstring strain.

Well, that's not good. Zimmerman was placed on the disabled list prior to Wednesday's game, and it doesn't appear he's anywhere close to returning to the club at this point. Anthony Rendon will get the majority of the starts at third base with Zimmerman sidelined.

Ryan Zimmerman 3B/LF WAS 28 Days

Nationals placed 3B Ryan Zimmerman on the 15-day disabled list with a strained right hamstring.

The Nationals are still awaiting MRI results before they determine how long the third baseman will be sidelined, but obviously they expect him to miss at least a couple weeks. Anthony Rendon will handle third base and Danny Espinosa will be at second while Zimmerman is on the shelf. Zach Walters is replacing Zimmerman on the roster.

Ryan Zimmerman 3B/LF WAS 28 Days

Ryan Zimmerman (hamstring) is expected to be placed on the disabled list.

Zimmerman left Tuesday's game against the Rockies with a strained right hamstring. The Nationals are still awaiting MRI results before they determine how long the third baseman will be sidelined, but obviously they expect him to miss at least a couple weeks. Anthony Rendon will handle third base and Danny Espinosa will be at second while Zimmerman is on the shelf. Zach Walters is replacing Zimmerman on the roster.

Ryan Zimmerman 3B/LF WAS 29 Days

Ryan Zimmerman will undergo an MRI after leaving Tuesday's game against the Rockies with a strained right hamstring.

It's looking like Zimmerman is headed to the disabled list, but the Nationals won't know for sure until the test results come back. It would be his second trip to the DL this season, as he missed nearly two months with a fractured thumb. The Nats would go back to Anthony Rendon at third base and Danny Espinosa at second if Zimmerman is on the shelf for a while.

Ryan Zimmerman 3B/LF WAS 1 Month

Ryan Zimmerman hit a go-ahead RBI single in the top of the 10th Saturday in a 5-3 win over the Phillies.

It was the only hit of the game for Zimmerman, but it was obviously a big one. He's batting .272/.342/.428 with 28 RBI in 47 games this season for the Nationals, who are tied with the Braves atop the National League East.