Born in Orange, California, Hunter Mahan was a high school golf champion, winning the 1999 US Junior Amateur Golf Championship while attending McKinney High School. He attended the University of Southern California and was Pacific-10 Conference Freshman of the Year as well as claiming the 1999 US Junior Amateur title.
In 2002, he earned the US Amateur Championship and was outstanding collegiate golfer and was given the 2003 Haskins Award. He turned professional in 2003 earning a PGA Tour card for the 2004 season and finishing 28th in the Masters as an amateur. He was the second youngest golfer on the Tour and distinguished himself with a T2 average at the Reno-Tahoe Open and a T4 finish at the Bell Canadian Open.
His performance in 2005 was not so productive but managed to improve his standing with a T9 finish in the Qualifying Tournament and in the FBR Open in Phoenix. He also earned a T7 slot at the John Deere Classic. His best finish in 2006 was a T2 scoring average at the Buick Championship. A T9 finish at the 84 Lumber Classic took him to an 83rd place on the PGA Tour money list.
In 2007, he made Players Championship history by making the firs double eagle at the second round in TPC Sawgrass. He also scored his first PGA Tour win at the Travelers Championship in an exciting sudden death match against Jay Williamson. He was the youngest player to win the title. He also finished T6 in the Open Championship and a T13 at the US Open. 2008 saw Mahan with a T2nd finish at the Travelers Championship with an impressive T35th scoring average in the PGA Tour.
In 2010, Mahan was able to win his second PGA Tour event when he defeated Rickie Fowler by just one stroke during the Waste Management Phoenix Open. A few months after the said victory, he again won another PGA Tour event, which was the WGC-Bridgestone Invitational.
To date, Mahan has 4 professional wins, 3 of which were on the PGA Tour.