Lesnar fought ZERO cans. Every opponent he had were above average to the best.
above average? I think EVERY person he fought was a past champion or soon to be champion. hmm except maybe heath herring and kim
1st fight was min-soo kim. I don't think he ever held a title. could be considered a can. at the time of the fight he was 2-5
2nd fight: Frank mir. 2 time champion when he fought brock. Lost to one of the top BJJ guys in that weight class. at the time of the fight he was 11-3
3rd fight: Heath Herring a guy with a ton of experience. fought for the title against nog and lost. At the time of the fight he was 28-13
4th fight: He fights Randy Couture For the heavyweight title. he wins At the time of the fight Randy was 16-8 and had won multiple titles in different weight classes
5th fight: Frank Mir again. Brock dominates and kicks mir's ass for eating his strawberries. Brock's 1st title defense.
6th fight: Shane Carwin. Shane was a champion himself. Brock defends really well and comes back to submit him. oh and at the time Carwin was 12-0
7th fight: Cain Velasquez. Cain is the baddest man on the planet. he dominates. kicks the living shit out of brock (btw he is still champ..with a minor setback).
8th fight: Alistair "horsemeat" Overeem. Overeem was strikeforce champion and master of the knee. At the time of the fight he was 35-11.
so besides the first fight nobody can be called a can. Also nearly all were champs.
yeah not a easy road to take in MMA.
also thats ignoring his 106-5 NCAA wrestling record.