Mario Ancic -professional tennis player, from being 7th in the ATP rankings
beating Federer at Wimbledon and reaching SF there
winning Davis Cup
reaching olympic bronze
Then finishes, unfortunately his tennis career at age 27 and goes back to school.
Receiving his Masters Degree at Columbia Law School in 2013 and just now finishing his Ph.D in Law.
He will now work at Credit Suisse on Wall St.