Yoan Pablo Hernández started boxing with the Cuban national team at a very young age. He got silver at the Cadet World Championships (under 17) 2001 at 201 lbs/91 kg. He won the heavyweight Junior World Championships in 2002 in Santiago de Cuba but lost twice to countryman Odlanier Solís and was forced to go down in weight. At light heavyweight (178 lbs) in 2003 Hernández won the silver medal at the Pan American Games in Santo Domingo where he lost to Ramiro Reducindo.
2004 3rd place at Cuban national light heavyweight competition, losing on points to Vladimir Linares Mesquia RSC 4
2005 Cuban national champion (light heavyweight)
Professional career
Cruiserweight
Hernández was a fast and hard-punching boxer who competed entirely at cruiserweight. Hernández knocked out Daniel Bispo in the first round to win the vacant WBA Fedelatin Cruiserweight Championship. On December 29, 2007, he knocked out world title challenger Mohamed Azzaoui to retain his WBA Fedelatin title and win the vacant WBC Latino title but suffered his first defeat on March 29, 2008 when he lost via 3rd-round TKO to ex-champ Wayne Braithwaite of Guyana after controlling the match for the first two rounds and even knocking Braithwaite down in the 1st round. Hernández got too cocky in the 3rd and decided to shoot it out with him resulting in Braithwaite knocking Hernández down 3 times. He later won a wide decision over prospect Aaron Williams.
On September 19, 2009 Hernández defeated Enad Licina by a wide UD for the IBF Inter-Continental Cruiserweight title, becoming the first Cuban to hold a version of the IBF title since it was created.
On March 13, 2010 Hernández made his first defense of the IBF Inter-Continental title by beating Cesar David Crenz by unanimous decision.
On February 12, 2011 Hernández won the InterimWBA Cruiserweight title by knocking out Steve Herelius. With this latest win he extended his undefeated streak to 10 fights since the defeat to Braithwaite and improved his overall record to 24-1 (13 knockouts).
Hernández vs. Cunningham I & II
On 1 October 2011, Hernández defeated The Ring No. 1 Cruiserweight, Steve Cunningham, by sixth round technical decision for the IBF Cruiserweight Championship. The fight was stopped due to Hernández being cut by an illegal headbutt, though the fight was not without controversy. Hernández knocked Cunningham down with a counter left hook in the first round and seemed to be badly hurt, but referee Mickey Vann decided to let the fight continue after what seemed like a controversial slow count.[4][5] Cunningham made a comeback during the second and third rounds, hitting Hernández with body shots in the second and becoming more aggressive during the third. However the latter round was also marred with controversy as Hernández was hit with an accidental headbutt that caused a cut and that many felt was intentional, with referee Vann not stopping the fight or even giving a warning to Cunningham. During the fourth round both fighters seems about equal, with Cunningham controlling the pace with his jab and Hernández successfully landing a combo. During the fifth round, Hernández accidentally hit Cunningham behind the head when referee Vann attempted to break up a clinch. During the sixth and final round the corner of Hernández as well as the ringside physician inspected the cut caused by Cunningham's headbutt. Afterwards Hernández seemed ready to resume with the round when the referee stopped the fight due to the physician deeming Hernández unfit to continue. The score cards were 57–56 for Cunningham and 58–55 and 59–54 for Hernández.[6]
Hernández and Cunningham had a rematch on 4 February 2012. The winner of this fight was to be crowned the new The RingCruiserweight Champion. Hernández won via unanimous decision.