Joe Dahl is back, and ready to start if need be.
The Detroit Lions activated Dahl from injured reserve Saturday, clearing the way for him to start at center Sunday against the Jacksonville Jaguars if Frank Ragnow cannot play because of a groin injury.
Dahl, the Lions' starting left guard last season, missed three games with a groin injury he suffered last month, but practiced in full this week.
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Ragnow is questionable to play after leaving practice Wednesday with a groin injury.