Keane said: "He was outstanding, today, Kenwyne. You get days like this in football when it is not quite going your way, but that's when the top people step up to the plate.
"Listen, lots of players have bad days, but they are still brave and they still show for it and they still put their bodies on the line, and today the players did that in the second half.
"I keep saying you have got to stay in the game - against Blackburn a couple of weeks ago, we didn't stay in the game, we gave away a second goal and it is always hard to come back.
"But at 1-0 today, Sunderland were always going to get chances with the law of averages.
"Kenwyne, especially when we were down to 10 men and he had not trained all week and he was up front on his own, he was outstanding.
"He is a really good team player, and that's what I admire about him."