Simplify the following text for a Grade 5 native English-speaking person.
Original: On January 4 , 1999 , Mick Foley , who had wrestled for WCW during the early 1990s as Cactus Jack , won the WWF Title as Mankind on Raw .
Simplified: On January 4 , 1999 . Mick Foley , who had wrestled for WCW in the early 1990s as Cactus Jack , won the WWF Title as Mankind on Raw .