The MLB record for innings played was 26 by Brooklyn and Boston in 1920. The minor league record is 33 innings between the Rochester Red Wings and the Pawtucket Red Socks in 1981.
major league baseball for the most career innings?
7 total innings are in a game altogether
New york mets 22 innings
5.98 innings per start, or about 6 innings, according to baseball-reference.com
9 in major leagues