MINNEAPOLIS -- Cam Heyward's growing frustration with what the 2021 season is turning into for the Steelers is obvious.
So is Mike Tomlin's.
That's because every time the Steelers think they have what has become their biggest Achilles' heel fixed, along comes another star running back to exploit it in an even bigger way than the last star running back to do so.
Two weeks after allowing Joe Mixon to run for a career-high 165 rushing yards and two touchdowns, Dalvin Cook rushed himself back from a separated shoulder suffered just 11 days ago to get a crack at the Steelers.