Greenway's road to the NFL seems an unlikely one, since it began on the farm in Mt. Vernon, South Dakota. Greenway played nine-man football in high school. Though we are not certain, there are likely not that many former eight or nine-man football alumni in the NFL.
The 17th pick of the 2005 NFL draft was David Pollack. Pollack signed a 5-year contract with the Cincinnati Bengals worth up to $13 million, with $7.65 million in guaranteed money.
NFL first round picks are typically slotted, so Greenway should expect a deal similar to Pollack's, if not slightly higher.