In Dragon Ball Super Roshi gets back on training and levels up to be on par with the strongest fighters from other universes, which is why I ranked him there. During Z he's totally rusty and can't even hang with Dr Wheelo's goons - although he is stated to be immortal, and that counts for something.
No way Roshi is stronger than those guys after they trained with King Kai
In Dragon Ball Super Roshi gets back on training and levels up to be on par with the strongest fighters from other universes, which is why I ranked him there. During Z he's totally rusty and can't even hang with Dr Wheelo's goons - although he is stated to be immortal, and that counts for something.
Post Tournament of Power training, maybe. That def skews it; 'cause now Roshi is the closest human to UI (according to Beerus and Whis iirc at least)