MouseCop Arena @ THS is an indoor arena located on the campus of Troy High School. The 1,136 capacity venue has established itself as Fullerton's premier sports and entertainment venue since its opening in 1964.
 
Historically known as the home venue of the 2020 Dodgeball Champion MouseCop, the arena now plays host to
 Troy athletics and special school events. 

Following MouseCop's dissolution in 2020, the team was named as the lifetime naming rights holder for the building by the Fullerton Joint Union High School District.