I'm gonna start off by naming the ones I know off the top of my head
NFL (Super Bowl):
Baltimore Colts x1 (Super Bowl V)
Baltimore Ravens x2 (Super Bowl XXXV, Super Bowl XLVII)
MLB (World Series):
Baltimore Orioles x3 (1966, 1970, 1983)
CFL (Grey Cup):
Baltimore Stallions x1 (1995)
AIFA/AIF (indoor football)
Baltimore Mariners x2 (2010, 2014)
NLL:
Baltimore Thunder x1 (1987)
MISL (indoor soccer):
Baltimore Blast (1980-92 version) x1 (1983-84)
MISL II/MISL III/MASL (indoor soccer):
Baltimore Blast (current version) x8 (2002/03, 2003/04, 2005/06, 2007/08, 2008/09 2012/13, 2015/16, 2016/17)
How has your city fared with sports championships?