Jason Christopher Dufner (born March 24, 1977) is an American professional golfer who plays on the PGA Tour where he is a five-time winner.

[6] Dufner was a walk-on at Auburn University, where he won three times in his college career and was an Honorable Mention All-American in 1997.

He retained conditional status for the 2008 PGA Tour season, and then finished T11 at the Q-School that year to earn his card for 2009.

[10] Early in 2011, Dufner had a chance to win his first PGA Tour title at the Waste Management Phoenix Open at TPC Scottsdale when he finished tied for the lead at 18-under-par after 72 holes, before eventually losing in a playoff to Mark Wilson.

Dufner completed the front nine in 33, two under par, while playing partner Steele dropped four shots early on and fell out of contention.

After his nearest challenger, Keegan Bradley, made triple bogey on the 15th, Dufner had a five-stroke advantage with four holes to play.

Meanwhile, Bradley scored back-to-back birdies on 16 and 17 to take the clubhouse lead at eight under, wiping out Dufner's advantage.

[14] Dufner continued his good form in 2012 by sharing the 36-hole lead at the Masters, but faded on the weekend to finish T24.

[15] Three weeks later at the Zurich Classic of New Orleans, Dufner won for the first time on the PGA Tour in his 164th start when he defeated Ernie Els on the second hole of a sudden death playoff.

He entered the final round with a two stroke advantage and shot a 70 to finish at 19 under par, a tournament total record, which Els also equalled.

In May 2012, Dufner had an opportunity to win his third PGA Tour title of the year at the Colonial, where he was leading after 36 and 54 holes respectively before being beaten by one stroke by former Masters champion Zach Johnson.

Dufner's excellent season continued at the 2012 U.S. Open where he finished in a tie for fourth place, two strokes behind winner Webb Simpson.

[10] Dufner qualified for his first Ryder Cup team in 2012, finishing with a record of 3–1 in the three day matches, including a 2-up win over Peter Hanson in the singles competition.

After a birdie at 16, Dufner scored par on holes 17 and 18 to finish the tournament at +5, four shots behind the leader, Justin Rose.

Dufner had the chance to finish with a 62 and the outright lowest round in a major, but he left his 12-foot putt for birdie at the 18th hole short.

That marked the second time in three years that Dufner was in the final group of the PGA Championship on Sunday.

In the final round, Dufner started well by making a birdie at the 4th hole, which took him into a share of the lead alongside Furyk.

Further birdies at the 5th and 8th holes, allied with Furyk bogeying the 9th, opened up a two-stroke advantage for Dufner entering the back nine.

On the 16th, Dufner stiffed his approach to within 18 inches, but Furyk holed a lengthy birdie putt to stay in touch.

He defeated David Lingmerth in a sudden-death playoff after both players finished four shots clear of the field at 25-under-par.

The term originated in March 2013 after a photo went public of Dufner slumping without expression while visiting a youth center in Irving, Texas.