Detriot will not be taking a RB at #2.
Here's the explanation behind that pick:
A Detroit writer agrees that Peterson would be a
type of pick -- so he contacted Gosselin. Gosselin said, for this mock draft, he was basically listing the players in terms of their draft status. He said there are three elite players who will go in the first three picks, in any order -- Peterson, JaMarcus Russell and Calvin Johnson. So it appears that Gosselin made his decision based strictly on the value of those top 3 players.
According to the writer, this is how it currently stands for the Lions pick:
Detroit wants to draft DE Gaines Adams, but they think #2 is too high to select him. So they'd rather trade down a few spots to get him, and acquire more picks in the process. If they remain at #2, chances are they'd take CJ or Joe Thomas.
Now regarding the Pats picks of Beason and Griffin. Once again, based on the perceived needs of teams -- he valued in the players. In his positional rankings, he has Beason as his #2 ranked OLB after Timmons, who went at #21. So he plugged in Beason at #24, filling a position of need, but also representing value (according to HIS rankings).
Griffin is ranked 4th on his Safety board, after Landry, Nelson, and Meriweather. Landry went 7th, Nelson went 18th, leaving Meriweather and Griffin to choose for the Pats. Perhaps he felt Griffin was a safer pick due to Meriweather's character concerns, or maybe he thought Griffin was a better fit. Either way, Gosselin addressed two positions of need in the first based on HIS value rankings.
Personally, I don't like the Beason pick. I'd take Staley at #24, and Griffin or Posluszny at #28. My real preference on draft day however, is to find a way of obtaining an extra day one pick to grab Josh Wilson, David Harris, or Stewart Bradley. Moving down from #28 makes the most sense for that to manifest.