For the first half of 2003, Cena sought the WWE Championship and chased the reigning champion Brock Lesnar after Wrestle Mania XIX, gaining upset wins over Eddie Guerrero, The Undertaker and Chris Benoit, who mocked him by wearing a "Toothless Aggression" shirt.
In a rematch between the two, Cena would once again defeat The Undertaker on the August 5 episode of Smack Down! The feud between Cena and Undertaker came to an end on the August 19 episode of Smack Down!
Cena would appear in a one-off appearance for the developmental farm in November under the ring name Mr.
After his main roster call up in June 2002, Cena would continue to appear on OVW programming until the September 25 taping of OVW, where he lost to Kenny Brolin in a Loser Leaves OVW match.
The reign ended almost four months after successful title defences against the likes of Rene Dupree, Rob Van Dam and Booker T, when he was stripped of the title on the July 8 episode of Smack Down!
by Angle after he accidentally knocked him over, thus attacking an official.
taping in Oakland, California, this time defeating Aaron Aguilera.
Cena wrestled again in a dark match at a Smack Down! In 2001, Cena signed a developmental contract with the WWF and was assigned to its developmental territory Ohio Valley Wrestling (OVW).