Oscar has showed good to average stamina in past he showed good stamina in Quartey and Vargas fight where he had very good spells in both fights late and then theres his stamina problems with Tito but i think anyone would be tired after all that running he was doing he has showed in few fights that his stamina let him down but overall his stamina is decent and in some fights its really good it just depends how hard Oscar works on his stamina or what kind of cardio work he does.