Mel Kiper's first mock draft has Brandon Graham going as the last pick of the first round to the Colts:
"Graham was a one-man show for the Wolverines, leading the nation in tackles for loss as a senior. Always in the backfield, he's a guy who can learn under master pass-rushers in Indy and build on the tradition. He's been on my Big Board all year, so a good value this late."
I believe he can improve his stock at the combines to be a top 25 pick, but I guess it wouldn't be a bad thing for Brandon to go to a solid team like the Colts.