Mattock picked up 2 yellow cards and was sent to the stands late on at Valley Parade.
Ben Purrington should take his place as Oldham visit the NYS on Saturday.
“He will now lose his jersey to Ben. If Ben performs well, he will keep it.” boss Paul Warne told the Star.
“I was disappointed with the challenge, It was needless. He was already on a yellow. You know if you make another foul you’re in trouble, so I am not defending the player. It was a yellow card."
“I bet he regrets it. If he made a genuine attempt for the ball, then fair play. But it was a definite yellow card. I expect a little bit more. He is a senior pro. He should have realised he was on a yellow and stayed on his feet.” Warne added.