When your starting quarterback has developed a nasty habit of suffering knee injuries, the training camp battle for the backup job tends to be conducted with a bit more urgency.

Yes, the sample size is small for EJ Manuel, and perhaps his 2013 rookie season was an anomaly as two of his three knee injuries could certainly be classified as fluky. Nonetheless, they happened, and he missed 6 ½ regular season games and two preseason games because of them.

The Bills were ill-suited to deal with Manuel's absences last year as journeyman Thad Lewis had just one NFL start under his belt, and Jeff Tuel was an undrafted rookie free agent signee. In fact, you could make the argument that — based on experience and talent level — the Bills had the worst quarterback depth chart in the NFL.

Nothing has changed in 2014 because the same three guys — joined by another journeyman, Dennis Dixon — are vying to make the roster at St. John Fisher College.

General manager Doug Whaley repeatedly expressed belief in his quarterback group during the offseason, so much so that he did not make a move to bring in an experienced backup to serve as insurance for another Manuel injury.