DeCastro was so clearly the guy that the Steelers started the process of trying to trade up to make sure they got him. As they investigated that process, they were finding that the cost to move up was either a No. 3 plus a No. 5, or a No. 4 plus a No. 6, depending upon how high up in the round they decided to go. At one point, the price was a little high and then at another point a potential trading partner couldn't be found, and on top of it all teams were turning in their picks in rapid succession.
Once the Patriots selected Jones, there were two picks remaining before the Steelers' turn, and both DeCastro and LB Dont'a Hightower were still on the board. Then when the Browns took Weeden, and the Detroit Lions immediately sent their card to the podium with OT Riley Reiff's name on it, the Steelers immediately followed by sending their card with DeCastro's name on it. The pick took literally a minute for the Steelers to make.