Itd look exactly like Patterson-Chuvalo, and that wasnt even a prime Patterson fighting Chuvalo. Patterson was simply to good, too fast, and too busy in his prime to lose to a guy like McCall who spent most of a fight doing nothing.
Floyd may have had a glass jaw in his title defenses, 1956-1962,but at least he had heart to get up and continue fighting,except against Sonny Liston, in 1962, and 1963. Floyd has fought big punchers George Chuvalo, Feb 1 1965, winning unanimous decision, and Oscar Bonavena, on Feb 14 1972, also a victor by unanimous decision over Oscar. Oliver McCall became the second fighter to dethrone champion Lennox Lewis, by a knockout, this time round 2, on Sept 24 1994. Lewis won it back on Feb 7 1997, by TKO 5, against a fighter who appeared to be suffering from a Nervous Breakdown, in the ring. I believe Floyd being the quicker handed fighter with a peek a boo style, might suffer a flash knockdown in round 3, but Patterson had heart, arises to score a unanimous decision over Oliver.
Patterson out works Mccall, but he'd need to be wary for the Lewis blasting shot. Other wise it's unanimous for Floyd.