Just because NBC finally put 'Joey' out of my misery after two interminable years on the air, that doesn't negate Joey Tribbiani's position to be the most qualified member of the 'Friends' coterie to be eligible for membership in the TV Crossover Hall of Fame.
He certainly has the qualifications:
'Caroline In The City'
And two of those are series in which he starred, not just guest spot crossovers.
And if he had to guess which two, I'll bet he wouldn't get it right on his first try......