#5. Paige
In some cases the Superstar in question doesn't necessarily make the choice to retire, and instead are forced into it due to a career-ending injury. This is exactly what happened with promising WWE women's division Superstar Paige.
The British starlet, who had subsequently been the subject of a major motion picture 'Fighting With My Family' was a big part of the 'Women's Revolution' and WWE's pivot towards letting the women properly wrestle.
She was NXT Women's Champion and won the Diva's Championship in her first main roster match against AJ Lee and has trail-blazed ever since until a serious injury sidelined her for several months.
Upon making her return, it seemed that big things were in store for Paige, as she formed the 'Absolution' faction, calling up Mandy Rose and Sonya Deville. However, her run was cut short after she suffered an injury at a house show and was advised to no longer wrestle.
This truly is the perfect case of a promising young career being cut short by unfortunate and tragic circumstances. It would have been amazing to see Paige's career unfold in the ring, but thankfully she still works for WWE and after a stint of being SmackDown Live General Manager is now managing the tag-team Kabuki Warriors.