9. The Absorbing Man
In the first couple of episodes of Agents of S.H.I.E.L.D.’s second season, fans were introduced to Carl “Crusher” Creel, better known as The Absorbing Man. However, before gaining his powers and becoming a villain, he was a boxer, the same boxer that Matt’s father beats against the orders of those who wanted him to throw the fight.
Despite not making a physical appearance (which feels like a wasted opportunity), the Creel – who would have been in his late teens/early twenties at this point – taken down by Battlin’ Jack Murdock is clearly the same one we met in Agents of S.H.I.E.L.D. This makes a lot of sense, especially as Creel was Jack’s opponent in Daredevil: Yellow, a comic written by producer of both shows, Jeph Loeb.