The first boxer I ever watched way Roy Jones and I thought in his prime no one could beat him. Hagler would beat him.

Roy Jones was unbeatable because his opponents let him be unbeatable. RJJ would pound on guys and then rest when he felt like it. The other guy wouldnt do nothing because he'd be too worried about being countered. Marvin wouldnt let RJJ rest for a second and RJJ would eventually get caught. If RJJ had SRL's chin he'd beat Hagler.