Junior Hoilett was concussed in a stoppage-time collision with Mark Schwarzer and Rovers manager Steve Kean was surprised not to see the latter sent off.
"I think just the way he spun and fell," he said. "He's got three or four stitches on the side of his head and was out for a few minutes, so he's concussed.
"It was quite a nasty challenge. I was expecting him to send him off.
"When I spoke to (referee) Howard [Webb], he felt that even if Hoilett had got the first touch, [Stephen] Kelly was coming round.
"At the time, and at the pace it happened, I thought it would be a red card.
"Schwarzer thought it might result in a goal, so he went all out for it. Hoilett, too.
"It was just a good professional attempt from each to score or prevent a goal.
"It's not a great challenge and he'll have some concussion. It's a bad one.
"It could have been worse. He was out for a little bit of time and it might affect him for the next game.
"He'll be fine."