Peter Quillin has two losses against two opponents on his boxing record. For a list of Quillin's best fights, refer to "Best fights of Peter Quillin".
On September 21, 2019 Peter Quillin faced off against Alfredo Angulo at age 36. He was coming in with a record of 34-2-1 (23), and Angulo was 37 years old and with a record of 25-7 (21). Quillin lost the fight via 10-round split decision.
On December 5, 2015 Peter Quillin fought Daniel Jacobs in a middleweight world-title fight for Jacobs' WBA (Regular) title. Quillin was 32 years old and with a record of 32-1-1 (23), and Jacobs was 28 years old and with a record of 30-1 (27). Quillin lost the fight via 1st-round TKO.