Mike Tomlin was perplexed as to why the Cleveland Browns traded Joe Flacco to the Cincinnati Bengals. We found out why Thursday night.

With Flacco at quarterback, the Bengals upset the Pittsburgh Steelers 33-31 in primetime.

The Steelers got off to a quick 10-0 lead, but the Bengals scored 20 unanswered points and were able to hold off their division rival.

Flacco targeted star wideout Ja’Marr Chase throughout the game. The Bengals wideout was uncoverable as he finished with a career-high 16 receptions for 161 yards and a touchdown.

Flacco passed for 342 yards and three touchdowns.