Andrzej Fonfara (born 4 November 1987) is a Polish former professional boxer who competed from 2006 to 2018 and held the IBO light heavyweight title from 2012 to 2013.

His professional career began in 2006 at Ostrołęka, where he won by majority decision against Czech fighter Miroslav Kubik.

Fonfara fought 43-year-old former world champion Glen Johnson (51-16-2, 36 KOs) on June 13, 2012, at Chicago's UIC Pavilion.

Fonfara connected well from the distance with jabs, followed by right hands, and only allowed Johnson a chance when he chose to fight in close.

[4] In front of 4,224 on a Friday night, Fonfara won the vacant IBO title after stopping Karpency in round 7.

In round 7, Karpency slipped and fell on his back, after pleading to the referee to help him up, he eventually got up himself and waved the bout off.

[5][6] On June 10, 2013, it was announced that Fonfara would next fight against Spanish boxer and former world champion Gabriel "EL Chico Guapo" Campillo.

The two fighters exchanged punches in a good-action final round and the crowd gave the fight a standing ovation.

Six months later in November 2014, Fonfara made a comeback at the UIC Pavilion in Chicago against fringe contender Doudou Ngumbu (33-5, 12 KOs).

[21] Fonfara fought Julio César Chávez Jr. on April 18, 2015, at the StubHub Center in Carson, California, for the vacant WBC International Light Heavyweight Championship.

Some words were lost in translation; he meant to say he felt he was winning the fight at the early stages of the bout.

[22][23][24] On October 16, 2015, Fonfara fought former world champion Nathan Cleverly (29-2, 15 KOs) at UIC Pavilion in Chicago for the WBC International light heavyweight title.

Fonfara outlasted Cleverly over 12 entertaining rounds to claim a victory by unanimous decision in the main event of a Premier Boxing Champions card.

Despite bleeding from a grotesquely swollen nose over the second half of the fight, Cleverly never stopped coming forward.

[25][26] It was announced that Fonfara would be defending the WBC International light heavyweight title against 26-year-old little-known Joe Smith Jr. (21-1, 17 KOs) at the UIC Pavilion in Chicago, Illinois, on June 18, 2016, in a scheduled 10 round fight in the main event of the Premier Boxing Champions card on NBC.

[27] In an 'Upset of the Year' in the light heavyweight division, Smith won the title by defeating Fonfara via a 1st-round technical knockout.

[28] On February 7, 2017, ESPN revealed that Fonfara would return to the ring on March 4 on the undercard of the Danny Garcia vs. Keith Thurman welterweight unification fight at the Barclays Center in New York.

38 seconds into the round, he landed a straight right to Dawson, which shook him, followed by a combination, which forced the referee to stop the fight and claim the much-needed win.

I thought he was doing quite well until he fell in and got caught with a punch.”[34][35] On April 23, 2018, it was reported that Fonfara would return to fight in Poland for the first time since his first professional fight in 2006 at the Hala Torwar in Warsaw on June 16 against former light heavyweight world title challenger Ismail Sillakh (25-5, 19 KOs) at the cruiserweight limit.

The ending came when Fonfara unloaded with a flurry of shots that led referee Leszek Jankowiak to stop the fight.

[38] On January 24, 2019, PBC announced Fonfara would fight Edwin Rodríguez (30-2, 20 KOs) on the Shawn Porter vs. Yordenis Ugas undercard on March 9 at the Dignity Health Sports Park in Carson, California.

[41] On August 5, 2023, Fonfara fought in his Mixed martial arts debut at Clout MMA 1 defeating Marcin Najman by TKO in 15 seconds of the first round.