It's not a rock band, they are Teenage Mutant Ninja Turtles Baseball T-Shirt

Teenage Mutant Ninja Turtles (initially known as Teenage Mutant Hero Turtles in some European countries) is an American animated television series based on the characters of the same name from comic books by Kevin Eastman and Peter Laird. It is the first adaptation of the Teenage Mutant Ninja Turtles. The pilot was shown during the week of December 14, 1987 in syndication as a five-part miniseries, and the show began its full-time run on October 1, 1988. Please, if you liked this design, you can help me a lot by sharing it or following my work. I will really be very grateful to you!