A left fielder, abbreviated LF, is an outfielder in the sport of baseball who plays defense in left field. In the numbering system used to record defensive plays, the left fielder is assigned the number 7.

Outfielders must cover large distances, so speed, instincts and quickness in reacting to the ball are key. They must be able to catch fly balls above their head and on the run. They must be able to throw the ball accurately over a long distance to be effective; they must also learn to judge whether to attempt a difficult catch and risk letting the ball get past them, or to instead allow the ball to fall in order to guarantee a swift play and prevent the advance of runners. Left fielders must also familiarize themselves with the varying configurations of different ballparks' foul territory, and prevent balls hit down the foul lines from getting past them into the left field corner. Amateur players may find it difficult to concentrate on the game, since they are so far from the action. Emphasizing the correct position will give outfield players something to concentrate on at each pitch. Hits to left field tend to curve toward the right field foul line, and left fielders must learn to adjust to that.

Of all outfielders, the left fielder often will have the weakest arm, as they generally do not need to throw the ball as far in order to prevent the advance of any baserunners. The left fielder still requires good fielding and catching skills, and tends to receive more balls than the right fielder due to the fact that right-handed hitters, which are much more common, tend to "pull" the ball into left field. The left fielder also backs up third base on pick-off attempts from the catcher or pitcher.

Owing to the fact that many early ballparks featured spacious territory in left field, with outfield fences particularly distant from home plate in order to prevent easy home runs, the phrase "out of left field" has come to be used in popular vernacular to describe any idea which seems wildly unrelated to the subject being discussed. Here is a list of renowned left fielders who were inducted into the Hall of Fame (*), and/or were winners of the Gold Glove Award (GG).

• Barry Bonds (9 GG)
• Lou Brock (*)
• Jesse Burkett (*)
• Fred Clarke (*)
• Ed Delahanty (*)
• Goose Goslin (*)
• Chick Hafey (*)
• Rickey Henderson (1 GG)
• Monte Irvin (*)
• Joe Kelley (*)
• Ralph Kiner (*)
• Heinie Manush (*)
• Joe Medwick (*)
• Minnie Miñoso (3 GG)
• Stan Musial (*)
• Jim O'Rourke (*)
• Al Simmons (*)
• Willie Stargell (*)
• Joe Rudi - (3 GG)
• Zack Wheat (*)
• Billy Williams (*)
• Ted Williams (*)
• Carl Yastrzemski (*) / (7 GG)

Other popular left fielders include:

• Bob Allison
• Brady Anderson
• Garret Anderson
• Sandy Amoros
• Albert Belle
• Phil Bradley
• Johnny Briggs
• Jose Canseco
• Bob Cerv
• Marty Cordova
• George Foster
• Dan Gladden
• Ken Griffey, Sr.
• Larry Hisle
• Chipper Jones
• Bob Johnson ("Indian Bob")
• Charlie Maxwell
• Hideki Matsui
• Ben Oglivie
• Tony Phillips
• Lou Piniella
• Tim Raines
• Manny Ramirez
• Jim Rice
• Gary Ward
• Roy White
• Willie Wilson
• Gus Zernial

See also

• Baseball Hall of Fame
• Gold Glove Award