In baseball

Baseball

Baseball is a bat-and-ball sport played between two teams of nine players each. The aim is to score runs by hitting a thrown ball with a bat and touching a series of four bases arranged at the corners of a ninety-foot diamond...

, a line drive is a type of batted ball, sharply hit, and on (or slightly above) a level trajectory

Trajectory

A trajectory is the path that a moving object follows through space as a function of time. The object might be a projectile or a satellite, for example. It thus includes the meaning of orbit—the path of a planet, an asteroid or a comet as it travels around a central mass...

. The threshold between a line drive (also sometimes called a liner or frozen rope) and a fly ball can be subjective.

Line drives can be dangerous to baseball players and spectators. For example, on July 22, 2007, Tulsa Drillers

Tulsa Drillers

The Tulsa Drillers are a minor league baseball team based in Tulsa, Oklahoma. The team, which plays in the Texas League, is the Double-A affiliate of the Colorado Rockies major-league club.-Stadium:...

 first base coach Mike Coolbaugh

Mike Coolbaugh

Michael Robert Coolbaugh was an American baseball player and coach. Born in Binghamton, New York, he was the brother of former major leaguer Scott Coolbaugh.-Playing career:...

 was killed in a line drive accident at an away game against the Arkansas Travelers

Arkansas Travelers

The Arkansas Travelers, also known informally as The Travs, are a Minor League Baseball team based in Little Rock, Arkansas. The team, which plays in the Texas League, is the Double-A affiliate of the Los Angeles Angels of Anaheim Major League club....

.