Trevor Bayne is a 20-year-old winner of the Daytona 500 but he's not the only young athlete to find success. Here are a few others:
Boxing: Mike Tyson won the heavyweight title at the age of 20 in 1986.
Golf: Johnny McDermott won a PGA Tour event (and Major) at 19 at the 1911 U.S. Open.
Baseball: Al Kaline won the batting title at 20 for the 1955 Detroit Tigers.
Basketball: Magic Johnson won the NBA Finals MVP at 20 in the 1980 NBA Finals.
Tennis: Martina Hingis won a Grand Slam at 16, winning the 1997 Australian Open.
Soccer: Pele won the 1957 World Cup at the age of 17.
Horse racing: Steve Cauthen won the Triple Crown at the age of 18 in 1978 aboard Affirmed.