On April 30, 2005, the 30-year-old WBO strawweight world champion, Iván Calderón (21-0, 4 KOs), faced Noel Tunacao, in a title defense fight.
Calderón came in to the fight on a 21-fight win streak with a 19% KO rate, and was fighting after a gap of 5 months and 3 days.
Iván Calderón stopped Noel Tunacao via TKO in the 8th round of the 12-round world-title fight, and successfully defended his WBO strawweight title. Calderón improves his record to 22-0 (5 KOs)
On April 29, 2006, the 31-year-old WBO strawweight world champion, Iván Calderón (25-0, 5 KOs), faced Miguel Tellez, in a title defense fight.
Calderón came in to the fight on a 25-fight win streak with a 20% KO rate, and was fighting after a gap of 2 months and 11 days.
Iván Calderón stopped Miguel Tellez via TKO in the 9th round of the 12-round world-title fight, and successfully defended his WBO strawweight title. Calderón improves his record to 26-0 (6 KOs)
On July 31, 2004, the 29-year-old WBO strawweight world champion, Iván Calderón (19-0, 4 KOs), faced a 24-year-old Mexican boxer Roberto Carlos Leyva (23-3-1, 20 KOs), in a title defense fight.
Calderón came in to the fight on a 19-fight win streak with a 21% KO rate, and was fighting after a gap of 4 months and 11 days. Leyva was on a 1-fight win streak with a 74% KO rate, and fighting after a layoff of 1 month and 10 days.
Iván Calderón defeated Roberto Carlos Leyva via unanimous decision and successfully defended his WBO strawweight title. Calderón improves his record to 20-0, while Leyva adds a loss to his record at 23-4-1.
On April 5, 2008, the 33-year-old WBO and The Ring light-flyweight world champion, Iván Calderón (30-0, 6 KOs), faced Nelson Dieppa, in a title defense fight.
Calderón came in to the fight on a 30-fight win streak with a 20% KO rate, and was fighting after a gap of 4 months and 4 days.
Iván Calderón defeated Nelson Dieppa via unanimous decision and successfully defended his WBO and The Ring light-flyweight titles. Calderón improves his record to 31-0
On October 21, 2006, the 31-year-old WBO strawweight world champion, Iván Calderón (26-0, 6 KOs), faced José Luis Varela, in a title defense fight.
Calderón came in to the fight on a 26-fight win streak with a 23% KO rate, and was fighting after a gap of 5 months and 22 days.
Iván Calderón defeated José Luis Varela via unanimous decision and successfully defended his WBO strawweight title. Calderón improves his record to 27-0
On February 18, 2006, the 31-year-old WBO strawweight world champion, Iván Calderón (24-0, 5 KOs), faced Isaac Bustos, in a title defense fight.
Calderón came in to the fight on a 24-fight win streak with a 20% KO rate, and was fighting after a gap of 2 months and 8 days.
Iván Calderón defeated Isaac Bustos via unanimous decision and successfully defended his WBO strawweight title. Calderón improves his record to 25-0
On December 10, 2005, the 30-year-old WBO strawweight world champion, Iván Calderón (23-0, 5 KOs), faced Daniel Reyes, in a title defense fight.
Calderón came in to the fight on a 23-fight win streak with a 21% KO rate, and was fighting after a gap of 5 months and 15 days.
Iván Calderón defeated Daniel Reyes via unanimous decision and successfully defended his WBO strawweight title. Calderón improves his record to 24-0
On December 6, 2003, the 28-year-old WBO strawweight world champion, Iván Calderón (17-0, 3 KOs), faced Alex Sánchez, in a title defense fight.
Calderón came in to the fight on a 17-fight win streak with a 17% KO rate, and was fighting after a gap of 3 months and 1 day.
Iván Calderón defeated Alex Sánchez via unanimous decision and successfully defended his WBO strawweight title. Calderón improves his record to 18-0
On September 5, 2003, the 28-year-old WBO strawweight world champion, Iván Calderón (16-0, 3 KOs), faced Lorenzo Trejo, in a title defense fight.
Calderón came in to the fight on a 16-fight win streak with a 18% KO rate, and was fighting after a gap of 4 months and 2 days.
Iván Calderón defeated Lorenzo Trejo via unanimous decision and successfully defended his WBO strawweight title. Calderón improves his record to 17-0
On June 12, 2010, the 35-year-old WBO and The Ring light-flyweight world champion, Iván Calderón (33-0-1, 6 KOs), faced Jesus Iribe, in a title defense fight.
Calderón came in to the fight on a 1-fight win streak with a 17% KO rate, and was fighting after a gap of 9 months.
Iván Calderón defeated Jesus Iribe via unanimous decision and successfully defended his WBO and The Ring light-flyweight titles. Calderón improves his record to 34-0-1