#2. Renato Sobral vs. David Heath at UFC 74
Renato 'Babalu' Sobral started fighting professionally back in 1997. The light heavyweight won 16 of his 18 fights before making his UFC debut.
He got off to a winning start against Maurice Smith in 2000. From 2002 to 2005, Sobral fought in multiple promotions. In 2002 he fought three times in the UFC and won only once. His final loss was against future champ Chuck Liddell. The submission specialist returned in 2005 and won twice. However, he lost the rematch in a title bout against Liddell, who won via KO.
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The fight with David Heath turned out to be his last in the UFC. 'Babalu' dominated Heath and sunk in an anaconda choke in round two. When his opponent tapped, Sobral refused to let go, even after the referee intervened. In the post-fight interview, he admitted to doing it intentionally. Sobral added that Heath had disrespected him and had to be taught a lesson.
The veteran's antics did not sit well with Dana White. He soon announced that the Brazilian had been cut from his contract. Sobral retired in 2013 after a brief stint at Strikeforce and then Bellator, with a record of 37-12.
#1. Rousimar Palhares gets banned after UFC Fight Night 29
Rousimar Palhares turned pro in 2004 and lost his first fight. Over the next few years, he won 8 of his 9 fights. He made his UFC debut in 2016 at UFC 84 and defeated Ivan Salaverry via submission. Palhares was a Brazilian jiu-jitsu ace and won nearly all of his fights via submission.
The middleweight knew how to out-grapple his opponents and catch them in deadly holds. However, letting go was a different matter. Following his UFC 111 win, he was suspended for 90 days for holding on to a heel hook for too long.
The submission specialist did not learn his lesson. In 2013, he faced Mike Peirce and secured a heel hook in round one. Unable to slip out, Pierce winced in agony and tapped a total of eight times before Palhares let go. Dana White was not pleased and had seen enough. Palhares was released and banned from competing in the UFC.
Incredibly, the Brazilian jiu-jitsu blackbelt still didn't learn his lesson. In 2015, he was cut from WSOF for failing to release a submission hold.