Manny Pacquiao's team is ALL IN for a rematch with Floyd Mayweather -- so says his trainer, Freddie Roach who tells TMZ Sports, "I really think Manny can knock him out."
After 40-year-old Manny put a hurtin' on Keith Thurman this weekend, there's a huge buzz about a MayPac II rematch ... following the first superfight back in 2015.
Roach, who's been training Pacquiao for years, says Manny and the entire team is down ... if Floyd is man enough to get back in the ring.