Peter Quillin (born June 22, 1983) is an American professional boxer who held the WBO middleweight title from 2012 to 2014.

On June 11, 2008, Peter defeated Dionisio Miranda by unanimous decision at the Hard Rock Cafe in New York City.

[2] In April 2010, Peter moved from New York City to Los Angeles to train with the 4-time trainer of the year Freddie Roach.

[3] On April 29, 2011, Quillin stopped title contender Jesse Brinkley to win the vacant United States Boxing Organisation Super Middleweight Championship in Reno, Nevada.

[5] On November 5, 2011, Quillin made his HBO debut, stopping Craig McEwan in the 6th round in Cancún, Mexico.

[6] On April 11, 2015, Quillin returned to the ring to fight Andy Lee at the Barclays Center in Brooklyn, New York in his Premier Boxing Champions debut, live on NBC.

[7] Due to not making weight at the weigh-in, however, Quillin was ineligible to win Lee's WBO World Middleweight Title.