Adam LaRoche underwent an MRI on his sore quadriceps muscle after experiencing a flare-up Friday.

LaRoche is out of the Nationals' starting lineup on Saturday and could be looking at an extended absence. He's been dealing with quad discomfort for over two weeks.

Adam LaRoche returned to action on Friday May 2.

Adam LaRoche is battling a sore quad.

That explains his absence from Wednesday's lineup. LaRoche, who's had this quad issue for over a week, expects to return Friday, after Thursday's scheduled team off day. Tyler Moore is playing first base on Wednesday.

Adam LaRoche is not in the Nationals' lineup Wednesday.

LaRoche is hitting .312/.413/.495 with four homers and 17 RBI this month but is getting a day off Wednesday versus left-hander Brett Oberholtzer. Tyler Moore is at first base in LaRoche's place.

Adam LaRoche went 2-for-5 with two RBI, including the game-winner in the ninth inning, against the Astros on Tuesday.

LaRoche did his best work late, driving in the game-tying run with a double in the eighth inning before coming back with the game-winning RBI single in the top of the ninth. He's now got 17 RBI on the season, and the notoriously slow-starting first baseman is batting an impressive .312/.413/.495.

Adam LaRoche continued his hot-hitting in Sautrday's victory over the Padres, going 1-for-3 with an RBI.

LaRoche also walked and scored a run in the ballgame. He's off to a terrific start in rebounding from a poor 2013 campaign, slashing .321/.430/.512 with four homers and 15 RBI in his first 23 games.

Adam LaRoche went 2-for-6 with a solo home run as the Nationals lost to the Padres on Thursday.

LaRoche extended his hitting streak to eight games, and his seventh-inning solo home run tied the game up at 3-3. The first baseman now has four home runs on the season, 20 percent of the way to last year's total. Through his team's first 23 games, LaRoche has a .919 OPS.

Adam LaRoche returned to action on Wednesday April 23.

Adam LaRoche went 3-for-5 and sent the Nationals to a 5-4 victory over the Angels on Wednesday with a walk-off RBI single.

LaRoche has hit safely in seven games and has been an on-base machine all season long, now with a .419 mark. The 34-year-old is not normally thought of as an offensive threat at his position, particularly after last year's lukewarm performance, but has been a big part of the Nationals' offense throughout April.

Adam LaRoche is not in the Nationals' lineup Tuesday due to a sore quad muscle.

He was hit with a pitch on the quad recently and is still a bit sore. However, manager Matt Williams indicated that LaRoche could have been in the lineup if they were't facing a lefty. He'll be available off the bench and should be back in there Wednesday. Tyler Moore is starting at first base Tuesday in LaRoche's place.

Adam LaRoche reached base in all four plate appearances in Tuesday's win against the Marlins.

LaRoche singled three times and walked while knocking in a run and scoring twice. His numbers fell across the board last season, but the loss of power particularly stood out. LaRoche, however, has been swinging well in the early going, batting .348 with two home runs in 30 plate appearances on the season.

Adam LaRoche hit a two-run homer off Brian Flynn in the Nationals' 10-3 defeat of the Marlins on Sunday.

The Nationals are giving Ryan Zimmerman some time at first base this spring, but LaRoche figures to be a lineup fixture if he produces. If not, then maybe he'll start sitting against left-handers, with Zimmerman sliding over.

Jon Paul Morosi of FOXSports.com reports that a couple of American League teams have checked in with the Nationals about the availability of Adam LaRoche.

He's drawing interest as both a first baseman and DH. LaRoche, who turned 34 earlier this month, batted just .237/.332/.403 with 20 homers and 62 RBI this season. He's under contract for one more year at $12 million and has a $2 million buyout on a $15 million mutual option for 2015.

Adam LaRoche told Nationals general manager Mike Rizzo he does not believe the bone chips in his elbow contributed to his disappointing 2013 season.

LaRoche underwent successful surgery in late October to remove loose bodies from his left elbow. The veteran first baseman slashed just .237/.332/.403 with 20 homers and 62 RBI in 590 plate appearances this past season. He'll require 4-6 weeks of rest before resuming workouts and is expected to be ready for the start of spring training.

Adam LaRoche underwent successful surgery on Friday to remove loose bodies from his left elbow.

As with teammates Stephen Strasburg and Bryce Harper who also underwent surgical procedures on Friday, he'll require 4-6 weeks of rest before resuming workouts. He's expected to be ready for the start of spring training.

Adam LaRoche is done for the rest of the year with a biceps strain.

The rest of the year, obviously, is two games, so it doesn't take much to be shelved for the season at this point. It's the end of a relatively disappointing season for LaRoche, who finishes with 20 home runs and 62 RBI, slashing .237/.332/.403.

Adam LaRoche is out of the starting lineup Friday against the Diamondbacks.

He's taking a seat with left-hander Patrick Corbin on the mound for Arizona. Tyler Moore will start in his place at first base.

Adam LaRoche is not in the Nationals starting lineup for the nightcap of Sunday's doubleheader.

Manager Davey Johnson is giving LaRoche a rest against opposing southpaw Brian Flynn. Tyler Moore will get the call at first base and hit seventh for the Nationals.

Adam LaRoche is not in the Nationals starting lineup for Saturday's game against the Phillies.

It's simply a routine day of rest against tough left-hander Cole Hamels. Tyler Moore will get the start at first base and hit seventh for the Nationals.

Adam LaRoche is not in the Nationals' lineup Thursday.

LaRoche is getting a routine day of maintenance. Tyler Moore will start at first base against the Cubs.