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ORCHARD PARK, NY - TheBuffalo Bills have released Quarterback Tarvaris Jackson on the eve of the start of their mandatory mini-camp.

The move sets up a battle for the starting quarterback job between rookie E.J. Manuel and veteran Kevin Kolb.Rookie QB Jeff Tuel ison the roster as well.

At the Bills' recent organized team activities, new head coachDoug Marrone stressedthe importance of giving his quarterbacks reps in practice tosee who pulls ahead.Jackson's releaseputs the focus on Manuel and Kolb in the battle for starting quarterback.