Joseph James "J.J." Killeen (born October 22, 1981) is an American professional golfer.

[3] Killeen made it to the final round of 2010 Q School, but missed earning a tour card by a single stroke.

Killeen ended the 2011 season as the top money earner on the Nationwide Tour, which grants him a full-season exemption on the PGA Tour for 2012, a spot in The Players Championship, and exemption from the reshuffle.

After his touring career ended, Killeen became a club professional out of the Northern Texas section of the PGA.

Nationwide Tour playoff record (0–1) Note: Killeen only played in the PGA Championship.