This actor, Adam Goldberg, played Eddie, Chandler's fruit drying psychotic roommate on Friends. He moved in with Chandler when Joey left to move into his own "soap-opera actor" pad.
10 years after, he appears on Joey as Joey's highschool bestfriend and the father of Joey's 22 year old nephew, Michael.
In the same episode, Joey talks about "not having seen his hands before" when in fact, he did this in Friends, Season 5 (The Identical Hand Twin).
From Episode 11, Season 2 - Joey and The High School Friend.
Original Airing: Dec. 8, 2005