Alexander among most improved in Big 12

Big 12 blogger David Ubben broke down the most improved players in the Big 12 on Thursday and included Oklahoma defensive end Frank Alexander. Here's what he wrote on Alexander:

The physical tools had always been there for Alexander, but he'd never quite progressed into what he looked like he could be as a freshman in 2008. Until this year, that is. Alexander was a monster all season, leading the Big 12 in tackles for loss (19) and finishing second in sacks (8.5) to win defensive player of the year honors.

What round of the NFL draft will Alexander be taken in April?