Rex Ryan has insisted that Tyrod Taylor has a chance to earn the starting quarterback job during the the Buffalo Bills' training camp.

The 25-year-old joined the Bills after four years as Joe Flacco's backup at the Baltimore Ravens, and has split first-team reps with EJ Manuel and Matt Cassel during the AFC East side's organised team activities this offseason.

Head coach Ryan told USA Today: "He is an unknown, never played a whole lot in Baltimore. I think the ability is hard to ignore, some of the things that he has.

"I think they all have something to prove. How they're going to be in this system, we're going to find out. Some quarterbacks flourish in certain systems and I believe all three guys will have a chance to be successful.

"I hope that's the case. And hopefully that decision is going to be tough, on a good note, not that this guy wins it by default."

Kyle Orton was Buffalo's starter for the majority of the 2014 NFL season, but announced his retirement at the end of the campaign.