Damar Hamlin was a special guest at a taping for "The Masked Singer" Tuesday night ... marking the Buffalo Bills safety's first public speaking appearance since his medical emergency last month.
TMZ Sports has obtained pictures from the set of the taping ... showing the 24-year-old holding a football and smiling on stage alongside host Nick Cannon, with his name in big red letters on the screen behind him.
Hamlin made his first public appearance at the Bills vs.