Neill Collins felt the Blades deserved a share of the spoils at Glanford Park on Saturday, after playing much of the game with a numerical disadvantage.
Michael Doyle was dismissed early on, before Ryan Flynn joined him for an early bath after the break, but the Scotsman, who had already hit the woodwork with a powerful header, glanced home a Tony McMahon free-kick to rescue a late point.
On his goal, Collins said: "When the first header hit the crossbar I was sure it wasn't going to be our day. It was a great ball from Flynny and I couldn't have made a better contact.
"I expected to hear the fans going mad and seeing the ball in the back of the net, but we kept going as we always do and thankfully my second header went in the net.
"It was a great delivery (from Tony McMahon) and it is something we work hard on in training, so to see it come off in a game is really pleasing."
Looking back at the workmanlike performance, the stand-in skipper felt everyone could be proud of their efforts against the Iron: "It was really difficult after the red cards, but particularly for the strikers and midfielders because they have to make up the ground and cover the space.
"We had to be switched on at the back and use our heads more than our legs, but everyone protected the defence and everyone deserves the plaudits.
"In football it is easy to praise the strikers when they score and the defenders when you keep clean sheets, but it isn't that simple because everyone has to contribute to all areas of the performance.
"In the circumstances this would have been seen as a decent point, but after what happened it has to be regarded as an even better point and it is nice to remain unbeaten."