UFC 137: Penn vs. Diaz(2011)

UFC 137: Penn vs. Diaz is a mixed martial arts event that took place on October 29, 2011, at Mandalay Bay Events Center in Las Vegas. The card featured a main event showdown between veteran fighter BJ Penn and rising welterweight contender Nick Diaz. Penn, a former UFC champion known for his technical striking and submission skills, faced off against the aggressive, high-volume striking style that made Diaz a fan favorite. The event showcased the evolution of UFC competition during the early 2010s, drawing top talent from across the promotion's roster. Held during a pivotal period in mixed martial arts, UFC 137 delivered memorable performances that highlighted the sport's growing depth and competitive intensity at the highest level.