#2. Anderson Silva
One of the four faces to be on the proverbial Mount Rushmore of UFC fighters, Anderson Silva had one of the most, if not the most impressive, runs as a UFC champion that the MMA world has seen.
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The longest streak that the promotion has seen from a champion, 16 wins had 'The Spider' looking invincible. However, the smoke was cleared in abrupt fashion as Chris Weidman knocked out the middleweight great. An immediate rematch was granted but would only introduce more hardship unto the career of the Brazilian.
In the second round of the rematch, a round that Silva began to find success in, he threw a leg kick that dropped the jaws of fans all over the world. Weidman checked the kick and Silva's leg wrapped around the champion's. The UFC has seen a similar injury with Corey Hill, but Silva's leg break remains one of the most shocking moments in UFC history.
#1. Chris Weidman
Going full circle in the worst way the sport has ever seen, Chris Weidman also broke his leg in the UFC. Following Silva's leg injury that resulted in Weidman's victory, he'd win a few more fights before falling into a slump. Weidman suffered many defeats but won a few, eventually positioning him to rematch Uriah Hall in 2021.
The fight didn't last long at all, but the former champion had a lot more bounce in his step than his previous performances. Weidman knew the danger that was opposite him, and this had him leaving no stone unturned in preparation for this bout.
The rejuvenated look was ephemeral as the only strike landed ended with a broken leg. Chris Weidman has been on both sides of this injury. Furthermore, this happened just moments after the previously listed Jimmy Crute leg injury. MMA can be very harsh; the highs are high but the lows sure can be brutal.