#6 Curt Hawkins, signed in 2006
Curt Hawkins only came back to WWE recently, but what's surprising is that he was only away from the company for a very brief period. He last appeared in NXT in 2014 and resurfaced following the brand split in July of 2016. So the man who created his own star factory only had a 2-year hiatus from WWE.
But what's more interesting about Hawkins is he's one of the most experienced active members of the WWE roster. He signed in 2006 and bounced around from the main roster to developmental, which may have contributed to the feeling of him not being in WWE as long as he really has.
Hawkins started in developmental, then went to SmackDown as part of La Familia with Edge and Zack Ryder. He then went back down to FCW, then back up as a member of the Gatecrashers with Vance Archer. And finally, he was sent down yet again, this time to NXT, to team with Tyler Reks and eventually become a solo jobber before being released.
Now Hawkins is back again to make us face the facts. And with such impressive career longevity, we may be facing the facts for a long time, even he's just kept around to put over other talents.