Northwestern athletic director Derrick Gragg said he was “extremely disappointed” that members of the football coaching staff wore shirts supporting fired coach Pat Fitzgerald on Wednesday.

Some staff members wore shirts that said “Cats against the world” with the number 51 on them to practice. Fitzgerald, a former Northwestern linebacker, wore No. 51 when he was a player. The longtime Northwestern coach was suspended and subsequently fired by the school after an investigation into hazing allegations within the program.

Gragg’s statement contrasted the remarks made by interim coach David Braun after practice. Braun said it wasn’t his place to censor anyone’s free speech when he was asked about the shirts. As the head coach of a football team at a private university, Braun has the right to dictate what shirts his staff can and cannot wear without infringing upon their First Amendment protections.