Here are the possible solutions for he replaced jay then jay replaced him clue
Answer
Clue
Relevancy
conan
Clue
He replaced Jay, then Jay replaced him
fordfiestaccato
Clue
Hybrid car that runs a few seconds, then stops, then runs again, then stops again...?
neko
Clue
Rocker Case who tweeted "If a dude called me a 'cougar' I'd be more likely to kill him bare-handed and shit him out in front of his parents than fuck him"
jeepliberty
Clue
It replaced the Cherokee, and was later replaced by the Cherokee
obrien
Clue
He replaced and was replaced by Leno
aaron
Clue
Aardsma replaced him as the alphabetically first MLB player