If you've followed WWE at all for the past 15-16 years, there's one name that you'd recognize almost immediately: John Cena. While Cena has cemented himself as one of WWE's most iconic superstars, you might not remember that he originally started as a rebel with a "degree in Thuganomics" who thought a bicycle chain with a Master lock was an acceptable fashion statement.

Since this year marks the 15th anniversary of Cena's WWE debut, we've chronicled nine milestones from his storied career.