#4. John Morrison
John Morrison's final match for WWE was the main event of Monday Night Raw in a Falls Count Anywhere match against his former tag-team partner The Miz. Morrison lost the match after The Miz delivered a Skull Crushing Finale onto the state and Morrison was stretchered off.
Whilst he was off 'injured', WWE released an announcement saying that Morrison's contract had expired and he was leaving the company. Morrison later revealed to Stone Cold Steve Austin on his podcast that WWE wanted him to sign another three-year deal but injuries and creative frustration led to him turning it down.
Since leaving, Morrison has starred in films, wrestled for Lucha Underground, AAA and Impact Wrestling where he currently finds himself the World Champion. The door is always open for him to return to WWE but it's unlikely he would.