Strained left knee forces Carlos Beltran out of Game 3

St. Louis Cardinals outfielder Carlos Beltran has left Game 3 of the National League Championship Series with a strained left knee.

Outfielder leads Cardinals with .400 playoff batting average, all players in extra-base hits

Carlos Beltran, right, hits into a double play in the first inning before leaving Game 3 with a knee problem. (David J. Phillip/Associated Press)

St. Louis Cardinals outfielder Carlos Beltran has left Game 3 of the National League Championship Series with a strained left knee.

The all-star right-fielder exited after grounding out in the first inning and Matt Carpenter took his place in the second. St. Louis says Beltran is day to day.

The Cardinals and San Francisco Giants are tied at one game each. Game 4 is Thursday night.

Beltran leads the Cardinals with a .400 post-season batting average. He has three home runs and six RBIs in the playoffs this year.

Beltran leads all players with eight extra-base hits in the playoffs this year. He is a career .375 hitter in the post-season.

It was not certain how Beltran got hurt. He appeared to move down the line after grounding out.