The second-year player left the game when he took a hard hit during a play that resulted in one of two third-quarter Colts touchdowns.
Indianapolis scored for a second time in the quarter with 6:30 remaining when quarterback Andrew Luck completed a 19-yard touchdown pass to receiver LaVon Brazill. It was Brazill who did most of the heavy lifting on the play, catching the short pass and dodging six attempted Bengals tacklers in order to score. While swept into attempting his own tackle, Iloka suffered an apparent head injury.
Iloka's return was immediately deemed questionable by the Bengals' training staff. Eventually, he was ruled out and didn't return.
Following the scoring play, several Bengals, including Iloka, remained on the field for a few moments as they collected themselves. They looked like orange and black bowling pins that had just been felled by the power-running bowling ball that was Brazill.
When Iloka left, he was replaced on the next Bengals' defensive series by defensive back Chris Crocker. Crocker was among those who missed a tackle on the touchdown reception.
Late in the fourth quarter, fellow Bengals defensive back, Terence Newman, left the game with a knee injury. Like Iloka, he was deemed out. It's unclear exactly how serious either injury currently is.