Simplify the following text for a Grade 8 native English-speaking person.
Original: Penn is a former UFC Lightweight Champion and UFC Welterweight Champion and was a coach on The Ultimate Fighter 5 reality show .
Simplified: Penn is a former one-time UFC Lightweight Champion and one-time UFC Welterweight Champion . Penn was also the coach of the 5th season of The Ultimate Fighter against the other coach , Jens Pulver .