Nine, but if the game is tied it goes into extra innings.
5 innings
A regular baseball game has 9 innings. If the score is tied after 9 innings, extra innings are played until until the game is resolved. The longest running game in professional baseball history lasted 33 innings with 8 hours and 25 minutes of playing time. It was between the Pawtucket Red Sox and Rochester Red Wings from the Triple-A International League in 1981.
2
7 innings
7 innings unless there is a mercy rule
There are 9 regulation innings. It can go into extra innings if the score is tied.
5 innings
Five innings constitute a game of rounders
9 innings
2
If a game is tied at the end of regulation innings (9 innings in the MLB), the game will continue for as many innings as necessary until there is a winner. However, local leagues may set maximum innings or time limits.
The longest MLB game by innings was on May 1, 1920 between the Brooklyn Dodgers and Boston Braves and lasted 26 innings. The game ended in a 1-1 tie.If you're including triple-A, the longest game was 33 innings, and it was played by The Pawtucket Red Sox and Rochester Red Wings, two teams from the triple-A International League. This is considered the longest game in professional baseball historyin 1981 at McCoy Stadium in Pawtucket, Rhode Island.