This depends on which championships, and which team. See related questions, or re-ask your question.
they went 30 times and won 15 times.
3 times: 1986, 1989 (win), and 2004. Additionally the 1924 Calgary Tigers of the WCHL lost while playing the Montreal Canadiens for the Stanley Cup.
The Wisconsin Badgers Men's Basketball team has a total of 19 Big Ten Championships. (17 Regular Season Championships, two Conference Tournament Championships)
None since the BCS determines the national champion.
Macho man never won a world championship with WWE. He won 2 WWF Championships and WCW world championships 4 times!
Twice: Calgary, Alberta (1988) and Vancouver, British Columbia (2010).
4 times winning in 1995 2000 2003 and losing in 2001
Since 1957, the Celtics have reached the NBA Finals 21 times and won 17 championships.
Nine. 4 WWE championships and 5 World Heavyweight
LeBron James has been to the NBA Finals a total of 3 times and won 1 of those times.
4 times
Twice: 1959: Calgary 14, Toronto 11 1991: Toronto 36, Calgary 21