#3 Early feud with Carlito
Just when Cena seemed unstoppable, resisting then-SmackDown GM Kurt Angle's attempts to wrest the US title from his grasp, he ran into a stumbling block: Carlito Caribbean Cool.
Carlito -- the son of Puerto Rican legend Carlos Colon -- shocked the live audience by besting Cena in the ring and taking his title. This led to some interesting promos between the two but sputtered out after a rather silly angle in which John Cena was allegedly stabbed in the kidney at a nightclub.
The negative backlash from the fandom that the WWE had portrayed its only high level Puerto Rican talent as a gang member fizzled out their feud early, but it was fun while it lasted.
Edited by anirudh.b