Bruce Campbell-esque career(wasted potential)
Both of them are either known for cult movies or TV shows and appear to almost avoid anything popular. On the rare occasion that either one of them is in bigger stuff - like GOTG, The Suicide Squad, and Spiderman - their roles are so minimal that it's a joke. They are cameos, not supporting characters. It has to be intentional, because they both have charisma and a following.
I did laugh my ass off at his bit in The Suicide Squad though.