Colts' Andrew Luck: Doesn't practice Tuesday
Luck (concussion) was unable to practice Tuesday.
Analysis:
With a concussion in tow during a short week of prep, Luck is already a long shot to take the field Thursday against the Steelers. One practice remains for the signal-caller to make his presence felt, but the five-step protocol for head injuries may be too much to overcome. If he's deemed inactive, Scott Tolzien will be under center against the 26th-ranked pass defense.
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