If CM Punk loses in UFC debut, Dana White will leave fighting again 'up to him'

The path for professional wrestler turned professional fighter CM Punk has been set. On Saturday, UFC newcomer Mickey Gall will get the first crack at Punk if he defeats Mike Jackson at UFC Fight Night 82.
Punk has no athletic or competitive martial arts experience background and at age 37, no one is exactly sure what to make of his fighting ability. So, what happens if the fight with Gall happens and Punk loses badly? Will he fight again?
"That's going to be up to him," UFC President Dana White