5 AEW Superstars you might not know once worked for WWE 

#3 Matt Jackson

The Young Bucks once appeared together as part of an episode of ECW

Matt Jackson is one half of The Young Bucks and has become well known all over the world, but interestingly despite the fact that The Young Bucks have made it well known that they don't want to sign for WWE, Jackson has made a number of appearances for Vince McMahon's conglomerate company.

Jackson's first appearance came back in 2008 when he was seen as a jobber on SmackDown Live in a match against Chuck Palumbo. He then wrestled The Big Show in an exhibition Last Man Standing match which he also lost after he was sent through a table.

The Young Bucks later appeared together on WWE TV as part of an episode of ECW where they portrayed Triple H and Shawn Michaels before they were taken out by The Miz and John Morrison to continue their interesting feud.

The two brothers later had a tryout with WWE prior to an episode of Monday Night Raw, but once again they weren't signed to the company and have since made a name for themselves in Ring of Honor, Chikara, New Japan Pro Wrestling and now All Elite Wrestling.