I saw nothing wrong with his stamina. He throws a lot of heavy punches so he might need a short breather every so often. Also, he is open to being hit just from the fact that he is an offensive minded fighter, although he defense isn't terrible.
Might just be the fact that I was up so late but after round 6 or 7 he just wasnt throwing hard enough and in all honesty I think Olusegun went down from pure Exhaustion of being hit so often, If the fight had gone on longer it would have been easier to tell
If you hit someone with those kind of bombs every round you think it's about having a bad stamina?? Olusegun showed extraordinary chin last night and I have no idea how he stood up so long but cmon dude... You can't blame mathysses stamina cause he was landing hard every round. I mean in my opinion he showed pretty good stamina cause was using his raw power all the time and wasn't gassing too hard. And yes he got hit but he knew everytime that there is a possibility for that but he didn't care about it. He's badass he knew that Ajose can't hurt him so why to bother about getting hit? I didn't see any weaknesses. It jus his style and he knew what he is doing and no one can compete against that what he did last night. My opinion.