DC's first MMA pro fight was in September of 2009, at the age of 30. Are you daft? He had 7 years of TOTAL FUCKING FIGHTING MILEAGE when he won the title (a vacant belt from a fight with Rumble)! He joined a major promotion at 31, and the UFC at 34. Daniel retired with a record of 22-3 after 11 years of fighting.
Fedor, at 7 years of professional experience, was 27-1, with a No Contest. He would win his next 4 fights. Fedor's loss to Werdum came exactly 10 years into his career, putting his record at 31-2. His first pro fight was at 24.
This was the worst attempt at a mike-drop ever. DC was wrestling for most of his athletic career, where injuries and concussions are far less of an issue. He did not get punched in the head until he was 30.