[2] Dwayne Stevenson, the pep chairman of BYU, bought the costume for $73 and persuaded his roommate Daniel T. Gallego to wear it and thus become the first Cosmo.
LaVell Edwards, the legendary football coach for the Cougars, wore the Cosmo costume during the final season basketball game against Utah in 1981.
[3] On September 2, 1997, BYU's Athletic Media Relations announced that while hunting Swoop the Hawk (rival) Utah's mascot in Rock Canyon, Cosmo fell 100 feet.
This included reduction in head size, which allowed Cosmo more range of motion and the ability to perform more daring stunts.
Cosmo frequently does flips, walks on stilts, rides motorcycles, and performs slam dunks in order to please the crowd.