The Bengals looked to remain undefeated as they hosted J. J. Watt and the Houston Texans. The Texans' starting quarterback, Brian Hoyer, left the game with a concussion, but recently signed backup T. J. Yates threw a fourth-quarter touchdown pass to DeAndre Hopkins.  Andy Dalton drove the Bengals into Texans' territory, but A. J. Green fumbled, sealing the Texans' 10-6 victory over the Bengals. With the stunning loss, the Bengals drop to 8-1, and were no longer undefeated, leaving the New England Patriots as the only unbeaten team in the AFC at that point.. How many games had the Bengals lost this season before this game?