Last year, it was the defensive line and linebacking corps. This year, it's the secondary.

Detroit Lions coach Dan Campbell announced Monday cornerback Terrion Arnold will "be out for a long time" with a shoulder injury he suffered in Sunday's 37-24 win over the Cincinnati Bengals . Campbell said he does not know if the injury is season-ending, but he did not rule out that possibility.

Arnold's absence is the latest in a string of blows to the Lions ' defensive backfield.

No. 1 cornerback D.J. Reed suffered a Grade 2/3 hamstring strain last week and is on injured reserve until at least November.

Top backup Ennis Rakestraw Jr. underwent shoulder surgery this summer and is out for the season. Looking for a free mini puzzle? Play the USA TODAY Quick Cross now.

Khalil Dorsey, anot

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