With the Steelers down by seven and less than a minute remaining, Mitchell leapt into the formation as the Jets were doing a kneel down, causing quarterback Michael Vick to get up and jump out of the way with the ball.
"We don't want to play football like that," said Tomlin.
A brief scuffle broke out on the field following the play and the clock continued to tick down. After the game, Jets center Nick Mangold called Mitchell's leap "a dirty play," and offensive guard Willie Colon said he thought it was "BS."
On Monday, New York coach Rex Ryan called Mitchell's play "bush league" and said he was "surprised" and "disappointed" with it.
The Jets won the game 20-13, snapping an eight-game losing streak.
- Molly Geary