Terrell Owens is ready to get into the celeb boxing game ... saying he wants a fight with Donovan McNabb -- and he's promising he'll knock his former QB out if it all goes down!!
T.O. joined Shannon Sharpe on the "Club Shay Shay" podcast this week and made the call-out ... making it clear time has NOT healed his feud with McNabb one bit.
"Shannon, I'll knock him out," Owens said ... "It'll be controlled anger. I'll be like a Navy SEAL.