The Browns quarterback pretended to expose his genitals after scoring against the Bengals and former Cleveland head coach Hue Jackson.
The Browns' first-year signal-caller set the National Football League single-season rookie record for passing TDs on Sunday when he tossed his 27th touchdown of the season on a one-yard completion to receiver Antonio Callaway.
The QB gestured toward his groin area near the sideline after throwing a 1-yard touchdown pass to Darren Fells in the second quarter of the 26-18 win.
While the dates and times won't be announced for a while, normally in April, the Steelers know who will be on the schedule, including the traditional AFC North opponents.
3:16 Watch a collection of the best moments from week 17
"That is something in our room that is an inside deal in our room that is going to stay in our room", Kitchens said. I like guys that have a relentless pursuit of competition. I told you a few weeks ago.
Mayfield threw three touchdowns Sunday to set the rookie record, despite not starting the first three games of the season.
The Browns wrap up the 2018 season Sunday afternoon in Baltimore against the Ravens.