Simplify the following text for a Grade 10 native English-speaking person.
Original: Prior to signing with WWE , Rosser wrestled under several ring names , including Frederick of Hollywood , Fred Rosser , and `` Bonecrusher '' Fred Sampson .
Simplified: Before signing with WWE , Sampson wrestled under several ring names , including Frederick of Hollywood , Fred Rosser , and `` Bonecrusher '' Fred Sampson .