INDIANAPOLIS (AP) — Indianapolis Colts receiver Adonai Mitchell opened Monday's team meeting by accepting responsibility for Sunday's costly gaffe .

Now comes the harder part — proving himself all over again.

One day after Mitchell started to celebrate his first career TD before crossing the goal line and fumbled the ball out of the end zone, erasing the score, in Sunday's 27-20 loss to the Los Angeles Rams, Colts coach Shane Steichen was still being peppered by questions about Mitchell's miscue and a litany of others including having only 10 defenders on the field when Tutu Atwell caught the tiebreaking 88 yard TD pass with 1:33 to play.

That one, Steichen said, was his fault.

“It shouldn’t happen, it’s unacceptable, and it starts with me as the head coach,” said Steichen, now in

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