Lance Berkman exits with hurt knee

LOS ANGELES -- St. Louis Cardinals first baseman Lance Berkman injured his right knee while taking a throw at first base during the second inning of Saturday night's 6-0 loss against the Los Angeles Dodgers.

Berkman injured himself stretching for a throw from shortstop Rafael Furcal on Justin Sellers' groundout for the third out of the inning. Matt Carpenter took over at first and committed a fielding error on a hard-hit grounder by former Cardinal Adam Kennedy in the fourth, allowing the game's first two runs to score.

The switch-hitting Berkman, a six-time All-Star and the NL comeback player of the year in 2011, has played in only 13 games this season and is batting .333 with a homer and four RBIs.

In Friday night's series opener, he homered as a pinch-hitter against Dodgers closer Kenley Jansen with two out in the ninth to tie the score, before the Cardinals lost in the bottom half on a bases-loaded walk. The homer ended the longest season-opening home run drought of his career after 40 at-bats.

Berkman had just come off the disabled list last Sunday after being sidelined for 21 games because of a strained left calf he aggravated while chasing a popup. Another trip to the DL is a distinct possibility, judging by the way he was limping around in the clubhouse.

"I wish I knew," said Berkman, who has been on the DL five times. "We're just going to wait and see what the MRI says, but it just doesn't feel right. It buckled on me twice, and I don't know why it did that. I was able to move around OK in here, and then it buckled again. So I have to be careful with it. It's not too painful, but it's just a weird feeling. I wish I could describe it. There's a little bit of instability that's mildly concerning."

Information from The Associated Press was used in this report.