Let's make this birthday one to remember.

43 years old (Born on December 31, 1981)

Happy Birthday, Diego "Nightmare" Sanchez! From dominating the first-ever season of The Ultimate Fighter to delivering unforgettable battles inside the Octagon, you've always brought heart and intensity. Your relentless spirit in fights like your legendary clash with Clay Guida still echoes through MMA history.

May this birthday bring you as much joy as that epic TUF finale victory did for fans worldwide. Keep embracing life with your trademark passion—just maybe avoid any more cartwheel kicks at family gatherings!

Here's wishing you another year filled with success, happiness, and fewer punches to the face outside training sessions. Cheers champ!