Terrion Arnold’s groin injury in Week 1 casts Week 2 doubt for Detroit, with an MRI pending and Dan Campbell non-committal on Arnold’s availability. If Arnold sits, Amik Robertson likely moves outside while Rock Ya-Sin could rotate in. Arnold’s 4 catches for 86 yards on six targets came with 23 snaps before exiting, including two big plays after the injury. Fantasy players should monitor MRI results and anticipate potential shifts in the Lions’ outside-corner duties.