Eric Bolte-USA TODAY Sports
5. Ken Shamrock vs. Tito Ortiz @ UFC 40, 2002
The feud between Shamrock and Ortiz fueled this fight more than anything else. At 38, Shamrock was already showing signs of wear and tear. Shamrock hadn't fought in the UFC in over six years and was coming off a split-decision loss to Don Frye at Pride 19.
Still, he found himself thrust into a light heavyweight championship fight against the younger, meaner Ortiz. "The Huntington Beach Bad Boy" beat-up Shamrock for three rounds, forcing his corner to mercifully throw in the towel.
This fight marked a turning point in Shamrock's career. He's gone 3-7 since that fight, with two of those losses coming against Ortiz.
4. Justin Eilers vs. Andrei Arlovski @ UFC 53, 2005
Eilers was viciously knocked out by Paul Buentello at UFC 51. However, when Arlovski's original opponent, Ricco Rodriguez, pulled out of the interim title fight, he was surprisingly replaced with Eilers.
Buentello should have been next in line to take on Arlovski. The UFC stated that "The Headhunter" was not medically cleared to fight in the main event, but he still ended up on the UFC 53 undercard.
Arlovski tore through Eilers like tissue paper, finishing the fight via technical knockout in the first round. Eilers lost his next UFC fight to Brandon Vera and was cut from the promotion.
Eilers then went on a 10-2 run but was killed tragically before getting another chance to compete inside the Octagon.
3. Frankie Edgar vs. Jose Aldo @ UFC 156, 2013
Edgar dropped back-to-back lightweight title fights to Benson Henderson but was granted an immediate shot at Jose Aldo when he made the drop to featherweight.
"The Answer" has been embroiled in a number of too-close-to-call fights over the years, and this one was no different. It went the distance with all three judges scoring it for Aldo (48-47, 49-46, 49-46).
Now for the first time in three years, Edgar finds himself fighting in a bout that isn't for a belt. He next takes on the unranked Charles Oliveira at UFC 162.
2. Nick Diaz vs. Georges St-Pierre @ UFC 158, 2013
This whole situation was like one big soap opera. While St-Pierre was recovering from a knee injury, Diaz fought Carlos Condit for the interim belt at UFC 143. He lost via unanimous decision and abruptly announced his retirement.
Diaz was also suspended for nine months after testing positive for marijuana metabolites. GSP defeated Condit in his return. It seemed logical that his next opponent would be the surging Johny Hendricks, but instead, he was passed over for Diaz.
St-Pierre promised to give the Stockton-born bad boy the worst beating of his life. However, the fight ended up being just another 25-minute grinder. Unhappy with the result, Diaz retired again.
1. John Lober vs. Frank Shamrock @ UFC Brazil, 1998
Lober defeated Shamrock via technical decision (split) at SB3—SuperBrawl 3. After the victory, Lober went 0-5-1 in his next six bouts but was granted a shot at Shamrock who was the reigning UFC light heavyweight champ at the time.
This was a fight specifically built upon the fact that he had a win over Shamrock and not on his merits inside the cage. This fact became abundantly clear when Shamrock forced Lober to tap due to punches at 7:40 in the first round.
Lober never competed in the UFC again. As of 2009, his professional MMA record sits at 5-9-4.