#4. Micheal Bisping - UFC middleweight
Michael Bisping was head kicked by Vitor Belfort and after the fight, he found out that he had a detached retina. Bisping had two surgeries performed on his eye but to no avail. The retina was getting detached again and again. Bisping was experiencing a lot of pain once he reached home and was taken to the hospital where they performed a minor surgery on his eye which took the pain away.
Get the latest updates on One Championship Rankings at Sportskeeda and more
Doctors told 'The Count' that he may never be able to fight again, but the British striker didn't listen to them and eventually made his way to capturing the UFC middleweight championship. Bisping’s accomplishments are unique because he was able to beat Anderson Silva, Luke Rockhold, and Dan Henderson with vision in just one eye.
#3. Brock Lesnar - UFC heavyweight
Brock Lesnar was then at the top of his career in mixed martial arts after capturing the title and defending it against Frank Mir. Lesnar was booked to fight Shane Carwin next but had to pull out. He was suffering from infectious mononucleosis.
Dana White announced that Lesnar was not well and wouldn't be able to compete for some time. The heavyweight champion had also developed diverticulosis which requires immediate surgery. On the operating table, the doctors found out that his intestines had been leaking as well, which had been causing him serious pain.
He was cleared of diverticulosis but it came back in 2011 and this time he had a foot of his colon removed. Lesnar made a return against Alaister Overeem, a fight which he lost very badly but given what he had gone through, the performance was quite understandable.