Simplify the following text for a Grade 9 native English-speaking person.
Original: Steve Young ( born Jon Steven Young on October 11 , 1961 in Salt Lake City , Utah ) , is a former quarterback for the NFL 's San Francisco 49ers and Tampa Bay Buccaneers .
Simplified: Jon Steven `` Steve '' Young ( born October 11 , 1961 , in Salt Lake City , Utah ) is a former American football quarterback , best known for his time with the NFL 's San Francisco 49ers . He also played for the NFL 's Tampa Bay Buccaneers and the Los Angeles Express of the United States Football League .