The following is from WWE.com.
BIRMINGHAM, Ala. ��" WWE Champion John Cena has suffered a complete tear of his right pectoral tendon and is heading into surgery, according to noted orthopedic surgeon Dr. James Andrews. Because of the seriousness of the injury, WWE officials will not allow Cena to compete this Sunday at No Mercy, and he will have no choice but to surrender the title.
Dr. Andrews said Cena could miss between six and eight months of action. Cena was injured during his match Monday night on Raw with Mr. Kennedy. Before visiting Dr. Andrews, Cena had said, “No matter how serious, the injury, one way or another I’ll be ready to compete on Sunday.”
But despite Cena’s vow, WWE officials will not allow him to compete at No Mercy. Therefore, he must surrender the WWE Championship.
WWE officials vow that there will be a WWE Championship Match this Sunday at No Mercy and a new WWE Champion will be crowned.