Alejandro Villanueva was a 6' 10" WR for Army.
He had tryouts for a bunch of NFL teams (WR and DE)
Tomlin saw him in a preseason game vs the Eagles.
He contacted Villanueva later (Eagles cut him) and said he that he could be a good OL and wanted him on the Steelers.
Villanueva put on 50llbs and made Pro Bowl 2X.
Tomlin is a good coach so Crook made a good landing