With quarterbacks coach Todd Downing and senior offensive assistant Jim Hostler joining offensive coordinator Nathaniel Hackett, the Bills believe they can get production whether they stick with Manuel, sign a veteran free agent or draft another quarterback.
Marrone is still high on Manuel, who showed positive signs between knee injuries as a rookie. If the 2013 first-rounder stumbles, though, it sounds like the Bills want to have a better backup plan in place this season.
Here's what else we learned from Marrone on Thursday:
» If full health is measured at "110 percent," Marrone acknowledged that C.J. Spiller was never at that level while dealing with a "nagging" high-ankle sprain in 2013.
» Much to the dismay of fantasy footballers, Marrone reiterated his preference for a two-running back system.