John Cena was one of the biggest breakout stars of the Ruthless Aggression era. Upon his debut, Cena quickly proved popular due to his "Doctor of Thuganomics" white rapper gimmick on the SmackDown brand, receiving a WWE Championship match against Brock Lesnar in the spring at Backlash in 2003, and had a major feud with The Undertaker during the summer. At WrestleMania 21, he won his first world championship when he defeated John "Bradshaw" Layfield, the WWE Champion at that time. Cena's popularity soared when he was drafted to Raw, where he quickly became the face of WWE, a rise not seen since Austin and Hulk Hogan. Cena's popularity has led to him becoming the all-time record "wish maker" for the Make-A-Wish Foundation, granting over 500 wishes as of August 2017. Cena secured victories over veterans Triple H and Shawn Michaels in the main events of WrestleMania 22 and WrestleMania 23, respectively. A popular wrestler during the period was Bobby Lashley from the ECW brand. Cena would defeat Lashley at The Great American Bash in 2007 in a well-received match, shortly after which Lashley left the WWE. After being sidelined due to a shoulder injury for the latter half of 2007, Cena returned in the 2008 Royal Rumble match, winning the match.