On November 24, 2007, the 28-year-old WBC light-flyweight world champion, Édgar Sosa (29-5, 15 KOs), faced a 28-year-old fellow Mexican boxer Roberto Carlos Leyva (26-6-1, 20 KOs), in a title defense fight.
Sosa came in to the fight on a 17-fight win streak with a 44% KO rate, and was fighting after a gap of 2 months and 8 days. Leyva was on a 3-fight win streak with a 60% KO rate, and fighting after a layoff of 1 month and 27 days.
Édgar Sosa stopped Roberto Carlos Leyva via TKO in the 4th round of the 12-round world-title fight, and successfully defended his WBC light-flyweight title. Sosa improves his record to 30-5 (16 KOs), while Leyva adds a loss to his record at 26-7-1.
On November 29, 2008, the 29-year-old WBC light-flyweight world champion, Édgar Sosa (33-5, 17 KOs), faced Juanito Rubillar, in a title defense fight.
Sosa came in to the fight on a 21-fight win streak with a 44% KO rate, and was fighting after a gap of 2 months and 2 days.
Édgar Sosa stopped Juanito Rubillar via TKO in the 7th round of the 12-round world-title fight, and successfully defended his WBC light-flyweight title. Sosa improves his record to 34-5 (18 KOs)
On April 4, 2009, the 29-year-old WBC light-flyweight world champion, Édgar Sosa (34-5, 18 KOs), faced Somporn Seeta, in a title defense fight.
Sosa came in to the fight on a 22-fight win streak with a 46% KO rate, and was fighting after a gap of 4 months and 6 days.
Édgar Sosa stopped Somporn Seeta via TKO in the 4th round of the 12-round world-title fight, and successfully defended his WBC light-flyweight title. Sosa improves his record to 35-5 (19 KOs)
On June 20, 2009, the 29-year-old WBC light-flyweight world champion, Édgar Sosa (35-5, 19 KOs), faced Carlos Melo, in a title defense fight.
Sosa came in to the fight on a 23-fight win streak with a 47% KO rate, and was fighting after a gap of 2 months and 16 days.
Édgar Sosa stopped Carlos Melo via TKO in the 5th round of the 12-round world-title fight, and successfully defended his WBC light-flyweight title. Sosa improves his record to 36-5 (20 KOs)
On September 15, 2009, the 30-year-old WBC light-flyweight world champion, Édgar Sosa (36-5, 20 KOs), faced Omar Soto, in a title defense fight.
Sosa came in to the fight on a 24-fight win streak with a 48% KO rate, and was fighting after a gap of 2 months and 26 days.
Édgar Sosa stopped Omar Soto via KO in the 6th round of the 12-round world-title fight, and successfully defended his WBC light-flyweight title. Sosa improves his record to 37-5 (21 KOs)
On September 16, 2007, the 28-year-old WBC light-flyweight world champion, Édgar Sosa (28-5, 14 KOs), faced Lorenzo Trejo, in a title defense fight.
Sosa came in to the fight on a 16-fight win streak with a 42% KO rate, and was fighting after a gap of 1 month and 19 days.
Édgar Sosa stopped Lorenzo Trejo via TKO in the 9th round of the 12-round world-title fight, and successfully defended his WBC light-flyweight title. Sosa improves his record to 29-5 (15 KOs)
On June 14, 2008, the 28-year-old WBC light-flyweight world champion, Édgar Sosa (31-5, 16 KOs), faced Takashi Kunishige, in a title defense fight.
Sosa came in to the fight on a 19-fight win streak with a 44% KO rate, and was fighting after a gap of 4 months and 5 days.
Édgar Sosa stopped Takashi Kunishige via TKO in the 8th round of the 12-round world-title fight, and successfully defended his WBC light-flyweight title. Sosa improves his record to 32-5 (17 KOs)
On September 27, 2008, the 29-year-old WBC light-flyweight world champion, Édgar Sosa (32-5, 17 KOs), faced a 26-year-old Filipino boxer Sonny Boy Jaro (26-6-5, 16 KOs), in a title defense fight.
Sosa came in to the fight on a 20-fight win streak with a 45% KO rate, and was fighting after a gap of 3 months and 13 days. Jaro was on a 3-fight win streak with a 43% KO rate, and fighting after a layoff of 3 months and 7 days.
Édgar Sosa defeated Sonny Boy Jaro via unanimous decision and successfully defended his WBC light-flyweight title. Sosa improves his record to 33-5, while Jaro adds a loss to his record at 26-7-5.
On March 9, 2013, a 33-year-old Édgar Sosa (47-7, 28 KOs) and Ulises Solís met in the ring for the 3rd time, in a flyweight bout.
Sosa came in to the fight on a 4-fight win streak with a 51% KO rate, and was fighting after a gap of 4 months and 10 days.
In the rematch, Édgar Sosa stopped Ulises Solís via KO in the 2nd round. Sosa improves his record to 48-7 (29 KOs)
On February 9, 2008, the 28-year-old WBC light-flyweight world champion, Édgar Sosa (30-5, 16 KOs), faced Jesus Iribe, in a title defense fight.
Sosa came in to the fight on a 18-fight win streak with a 45% KO rate, and was fighting after a gap of 2 months and 16 days.
Édgar Sosa defeated Jesus Iribe via unanimous decision and successfully defended his WBC light-flyweight title. Sosa improves his record to 31-5