On May 4, 2013, a 27-year-old Abner Mares (25-0-1, 13 KOs) got a shot at the WBC featherweight title held by 32-year-old fellow Mexican boxer Daniel Ponce de León (44-4, 35 KOs).
Mares came in to the fight on a 5-fight win streak with a 50% KO rate, and was fighting after a gap of 5 months and 24 days. León was on a 3-fight win streak with a 72% KO rate, and fighting after a layoff of 7 months and 19 days.
Abner Mares stopped the champion via TKO in the 9th round of the 12-round world-title fight, and is crowned the new WBC featherweight champion. Mares improves his record to 26-0-1 (14 KOs), while León adds a loss to his record at 44-5.
On December 10, 2016, a 31-year-old Abner Mares (29-2-1, 15 KOs) got a shot at the WBA (Regular) featherweight title held by 29-year-old Argentinian boxer Jesús Cuellar (28-1, 21 KOs).
Mares came in to the fight on a 1-fight losing streak with a 46% KO rate, and was fighting after a gap of 1 year, 3 months, and 11 days. Cuellar was on a 11-fight win streak with a 72% KO rate, and fighting after a layoff of 1 year and 5 days.
Abner Mares defeated Jesús Cuellar via split decision and wins the WBA (Regular) title. Mares improves his record to 30-2-1, while Cuellar adds a loss to his record at 28-2.
On November 10, 2012, the 26-year-old WBC super-bantamweight world champion, Abner Mares (24-0-1, 13 KOs), faced Anselmo Moreno, in a title defense fight.
Mares came in to the fight on a 4-fight win streak with a 52% KO rate, and was fighting after a gap of 6 months and 20 days.
Abner Mares defeated Anselmo Moreno via unanimous decision and successfully defended his WBC super-bantamweight title. Mares improves his record to 25-0-1
On April 21, 2012, 26-year-old Abner Mares (23-0-1, 13 KOs) and Eric Morel fought for the vacant WBC super-bantamweight title.
Mares came in to the fight on a 3-fight win streak with a 54% KO rate, and was fighting after a gap of 4 months and 18 days.
Abner Mares defeated Eric Morel via unanimous decision . Mares improves his record to 24-0-1
On December 11, 2010, a 25-year-old Abner Mares (20-0-1, 13 KOs) and a 34-year-old Armenian boxer Vic Darchinyan (35-2-1, 27 KOs) met in the ring in a bantamweight bout.
Mares came in to the fight after a draw in his last fight with a 61% KO rate, and was fighting after a gap of 6 months and 19 days. Darchinyan was on a 3-fight win streak with a 71% KO rate, and fighting after a layoff of 6 months and 21 days.
Abner Mares defeated Vic Darchinyan via split decision in the 12-round bantamweight fight. Mares improves his record to 21-0-1, while Darchinyan adds a loss to his record at 35-3-1.
On March 15, 2008, a 22-year-old Abner Mares (15-0, 9 KOs) and Diosdado Gabi met in the ring in a bantamweight bout.
Mares came in to the fight on a 15-fight win streak with a 60% KO rate, and was fighting after a gap of 3 months and 27 days.
Abner Mares stopped Diosdado Gabi via TKO in the 2nd round. Mares improves his record to 16-0 (10 KOs)
On August 13, 2011, a 25-year-old Abner Mares (21-0-1, 13 KOs) got a shot at the IBF bantamweight title held by 31-year-old Ghanaian boxer Joseph Agbeko (28-2, 22 KOs).
Mares came in to the fight on a 1-fight win streak with a 59% KO rate, and was fighting after a gap of 8 months and 2 days. Agbeko was on a 1-fight win streak with a 73% KO rate, and fighting after a layoff of 8 months and 2 days.
Abner Mares defeated Joseph Agbeko via majority decision and wins the IBF title — in his first world-title fight. Mares improves his record to 22-0-1, while Agbeko adds a loss to his record at 28-3.
On December 3, 2011, Abner Mares and Joseph Agbeko met again in an immediate rematch.
Mares came in to the fight on a 2-fight win streak with a 56% KO rate, and was fighting after a gap of 3 months and 20 days. Agbeko was on a -1-fight win streak with a 71% KO rate, and fighting after a layoff of 3 months and 20 days.
Abner Mares defeated Joseph Agbeko via unanimous decision in the rematch and successfully defended his IBF bantamweight title. Mares improves his record to 23-0-1, while Agbeko adds a loss to his record at 28-4.
On June 9, 2018, Abner Mares and Léo Santa Cruz met again in a rematch.
Mares came in to the fight on a 2-fight win streak with a 44% KO rate, and was fighting after a gap of 7 months and 26 days. Cruz was on a 2-fight win streak with a 52% KO rate, and fighting after a layoff of 7 months and 26 days.
Léo Santa Cruz defeated Abner Mares via unanimous decision in the rematch and successfully defended his WBA (Super) featherweight title. Cruz improves his record to 35-1-1, while Mares adds a loss to his record at 31-3-1.
On September 7, 2007, a 21-year-old Abner Mares (13-0, 8 KOs) and Isidro García met in the ring in a bantamweight bout.
Mares came in to the fight on a 13-fight win streak with a 61% KO rate, and was fighting after a gap of 2 months and 1 day.
Abner Mares stopped Isidro García via RTD in the 7th round. Mares improves his record to 14-0 (9 KOs)