#4 John Cena - 18 years
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It's hard to remember a WWE without John Cena, especially seeing as he first came through the doorway back in 2000. From that moment on, nobody could've possibly imagined the heights that The Prototype would eventually reach. Despite numerous injuries and setbacks, he's been able to rise above the hate (apologies), and he is still one of the most important members of the roster to this day.
Cena may be only appearing sporadically at the moment, but it feels like he's earned the right to move into a part-time schedule. After all, we're talking about someone who carried WWE for the better part of a decade, and that's no exaggeration. Cena has single-handedly led us through some tough times, and fans are only just starting to appreciate that.
Is this man the funniest man in wrestling?