On Tuesday, the Steelers made their fifth roster move since Saturday's "final" roster cuts, promoting linebacker/special teams demon Terence Garvin from the practice squad and designating tight end Matt Spaeth for the injured reserve/to return list.
Garvin is a light (221 lbs.) and mobile linebacker out of WVU. He has the look of a playmaker on defense, but he will be expected initially to make an impact on special teams.
It's a good thing there's no playbook, to speak of, for special teams. All the changes since Saturday are special teams moves, except for the addition of new backup center Cody Wallace.
By the way, the Raiders have claimed linebacker Marshall McFadden, whom the Steelers let loose last weekend.