Thierry Henry
Credit: Mike Stobe / Getty Images

The 36-year-old forward has scored 41 goals since joining the New York Red Bulls in 2010, including 10 goals in 2013. He made his professional debut with AS Monaco in 1994 and continued his career with Juventus, Arsenal, and FC Barcelona. "Your soccer life usually lasts through your late 20s – at least at the Premier League level," says the Bulls' medical director, Dr. Riley Williams. "And here the guy is in his mid-30s who's basically our unquestioned team leader. And again, he's another guy who, if you just look at him, is just as fit, focused, and fleet of foot as our newly acquired high-school players."