#3 Sheamus
"The Celtic Warrior" Sheamus may not be the most relevant WWE Superstar on the roster as we speak, but the former 4-time World Champion is undoubtedly a wrestling veteran most fans respect. Just like Kane, Sheamus has accomplished all there is to in WWE, and he is definitely just enjoying the bit of time he still has in his in-ring wrestling career alongside Cesaro.
For those of you unaware, Sheamus has been suffering from a potentially career-ending injury (spinal stenosis) since late last year, and this is the same kind of injury which forced "The Rated R Superstar" Edge to retire prematurely.
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It's clear Sheamus is wrestling on borrowed time right now, and it's doubtful the Irishman will be wrestling much further beyond 2019. Apparently, the WWE have been attempting to "protect" Sheamus from taking too many bumps as of late, as Vince knows Sheamus' condition will only worsen with more in-ring abuse. Some fans never regarded Sheamus as being a great main eventer in WWE, but his presence will certainly be missed by many once his final wrestling day comes in the not-so-distant future...