the airizona cardinals, i think and the Pittsburgh penguins
A university/college that uses the Rebel as the mascot is the University of Mississippi. The name of the sport team that uses Rebel as the mascot is the Ole Miss Rebels football team.
According to this contributor's quick look around the internet, no major team has a pitbull as a mascot. Several sports team use a bulldog mascot, though.
The Harvard Football team's nickname is the Crimson, as in the dark red crimson color. This is similar to the Stanford Cardinal, which also uses a color as their team name. Also similar to Stanford, which uses a pine tree as its mascot, the Harvard Crimson's mascot is a pilgrim/patriot-looking character.
The Academy uses the Navy ram as a mascot.
The University of Kansas uses the jayhawk as their mascot. The history of Kansas and the jayhawk went as far back as 1912 and the mascot is still believed to bring good luck.
The Toronto Blue Jays, Major League Baseball