This Saturday's UFC 81: Breaking Point event features one of the most talked about fights in recent memory, as former WWE Champion Brock Lesnar (1-0) makes his MMA debut against former UFC Heavyweight Champion Frank Mir (10-3).

The fight has been criticized by many long time MMA fans who are surprised that the UFC would pit Lesnar against a former UFC Champion in only his second ever MMA fight. However, Lesnar is the current betting odds favorite, as he's currently a -150 favorite while Frank Mir is a +120 underdog. MMA fans and wrestling fans who watch UFC are also at odds. In our poll here at MMAFightLine.com where we asked visitors who will win the Lesnar - Mir fight this Saturday, about 60% went with Mir. A similar poll on WrestlingInc.com has Lesnar with 55% of the vote, Mir with 23%, 4% Undecided and the remaining 18% saying that they don't follow UFC.

Lesnar's amateur wrestling background is well known. He placed second in the NCAA wrestling championship in 1999 before winning it in 2000 as a heavyweight. Lesnar finished his amateur career as a two-time NJCAA All-American, two-time NCAA All-American, two-time Big Ten Champion, and the 2000 NCAA heavyweight champion with a record of 106-5 overall in four years of college.

Lesnar's raw strength is very impressive, as he left WWE in 2004 for a career in the NFL despite not having played football in college. He managed to play a few preseason games for the Minnesota Vikings, however was eventually cut from the team before the season began. He turned down an offer to play in NFL Europe as a representative for the Vikings and his career was in limbo.

He came close to returning to WWE in 2005, however negotiations quickly ended. A year later in April of 2006, Lesnar announced he was getting into MMA with K-1. He made his MMA debut on June 2, 2007 defeating Min Soo Kim (his original opponent, Choi Hong-Man, was pulled from the fight) via submission in under two minutes.

Frank Mir had a promising career in the UFC Heavyweight division. Mir had made his UFC debut on November 2, 2001, defeating Roberto Travern via submission with an armbar at 1:05 of round one. He continued to garner several impressive victories (with only one loss) before defeating Tim Sylvia on June 19, 2004 for the vacant UFC Heavyweight Title at UFC 48: Payback via submission with an armbar (with Mir breaking Sylvia's arm) at 50 seconds in the first round. The title run was short lived however, as he was involved in a serious accident on September 17th of that year when he was knocked off his motorcycle by a car. The accident caused a break in Mir's femur bone and tore all the ligaments in his knee, and many thought that the accident would be the end of his MMA career.