#3 Not a bigger star after moving to WWE - Perry Saturn

Unlike his fellow Radicalz member Eddie Guerrero, Perry Saturn didn’t really get a chance to shine after moving to WWE. After The Radicalz went their separate ways, Saturn started to fall down the card.
Things got even worse after Saturn lost his cool during the middle of a match on WWE Jakked. Saturn’s opponent Mike Bell messed up a snapmare. This led to Saturn legitimately snapping and attacking Bell. Saturn almost ended up dropping Bell on his head but thankfully he escaped without serious injury.
Vince McMahon was livid and Saturn probably got the mop gimmick as a punishment because of the Mike Bell incident. Saturn injured his ACL soon after this and was released in November 2002.
#3 Bigger star after moving to WWE - Rey Mysterio

Rey Mysterio was another one of Eric Bischoff’s brilliant signings for WCW’s Cruiserweright division. WWE tried to copy its success with its own light heavyweight division but couldn’t match up to the talent WCW had in that department. WCW made the massive mistake of unmasking Mysterio later on in his run with the company.
Mysterio signed with WWE in mid-2002, making his debut in July. He was back under a mask for his WWE run and this was one of the best decisions WWE made.
Mysterio was a fan favourite in WWE and despite his size, got pushed to the main event level because of how good he was at what he did.
He won the 2006 Royal Rumble after close friend Eddie Guerrero’s untimely death and went on to win the WWE Championship at WrestleMania.
Mysterio has gone on to become a WWE legend, winning a whole host of titles. He recently wrestled at WWE Extreme Rules against Seth Rollins but is currently out of contract.