"A little numb," the Browns quarterback added while also noting that the injury didn't seem to limit him in the second half.
Mayfield injured the thumb on his throwing arm with 16 seconds remaining in the first half. The 2018 top overall pick was throwing the ball downfield to wide receiver Odell Beckham Jr. when his thumb lodged in Steelers linebacker Bud Dupree's facemask on his follow through.
Cleveland's backup quarterback Garrett Gilbert came in for two plays to finish out the first half, but Mayfield played the entire second half.
The Athletic's Zac Jackson relayed that Mayfield had "a rather large wrap on the hand" but reiterated "he didn't feel it affected his play in the second half."
Cleveland and Pittsburgh entered the second half tied at 10. The Browns managed just one field goal after that, and Mayfield turned the ball over twice. He fumbled as Dupree sacked him on the team's first possession of the third quarter and then later threw a game-ending interception to Joe Haden:
Overall, Mayfield finished the outing with 196 yards, one touchdown and one interception on 18-of-32 passing.
The 24-year-old signal caller has struggled in his sophomore season. His 14 interceptions are third-most in the league, and he has only thrown 15 touchdowns to offset them.
Beyond the status of Mayfield's thumb moving forward, the Browns' season seems all but over at 5-7.