Babe Ruth used this bat to hit his first home run in Yankee Stadium in 1923; it's seen here in 2004 at Sotheby's in New York. Bat design hasn't changed much in more than 100 years, other than ...

Each team's time at bat is a half-inning. Line Drive: A ball which is batted directly to a fielder without touching the ground. Offense: The team currently at bat.