Six overtimes in a game between Indianapolis Olympians and the Rochester Royals on January 6, 1951. Indianapolis won 75-73 in this 4 hour game.
Kerrville Toby had a 13 overtime game in the early 1980's.
The NCAA record was 7 OT's in 1981
Basketball is played in most countries professionally. The United States, most of Europe, China, Japan, and most other countries have professional basketball teams.
The longest NHL game was played March 24, 1936 between the Montreal Maroons and the Detroit Red Wings in the semifinals of the Stanley Cup playoffs. The game went five full overtime periods and 16:30 into the sixth overtime period before Mud Bruneteau scored for Detroit to give them a 1-0 victory. Total time of the game was 176 minutes, 30 seconds.
I believe it was 161 by the denver nuggets about 2 years ago....
A wrestling match has no periods or halves like most sports .........