ESPN's Adam Caplan reported the news:
Sal Maiorana of the Democrat and Chronicle noted that the Bills avoided paying Kolb a $1 million roster bonus, and feels that the team must seek out another backup QB option:
Kolb just has not panned out in the NFL. Between a myriad of injuries, inconsistent accuracy and wavering in the face of pressure, the 29-year-old veteran has not lived up to his billing as a second-round pick in the 2007 draft.
Although he has good arm talent and underrated athleticism, something has always been unfortunately off for Kolb to prevent him from developing into a reliable, long-term starter. When he arrived in Buffalo last offseason, Kolb stirred controversy—and laughter, to be frank—when he made one of the bolder proclamations coming from a player of his caliber and pedigree:
What really held Kolb back last season was a severe, possibly career-threatening concussion, but in any event he didn't play a single down in 2013.
A Super Bowl never materialized for Kolb and the Bills, and he only had one season (in which he was injured) to make good on his lofty goal. A little over a month after he signed, though, Buffalo drafted E.J. Manuel to be the franchise quarterback of the future, relegating Kolb to becoming a bridge starter at best.
Given Kolb's history of concussions—he missed time in 2010 and 2012 with them as well—and the seriousness of his most recent one, the Philadelphia Inquirer's Jeff McLane felt that Kolb would retire soon:
Retirement has to be a route Kolb at least contemplates at this point. It doesn't appear he'll get many, if any, chances to prove himself as a surefire starting signal-caller again in the NFL, and playing in a different league would be a letdown. The factors that have gone into his lack of success aren't totally in his control, and the two seasons he had with the Arizona Cardinals to prove himself saw him play just 15 total games.
The free-agent QB market is rather thin this offseason, though, so it's conceivable that Kolb could be brought in as a backup for a team that's starved for depth at the position. Although no team is likely to overpay for Kolb, he would embrace just about any opportunity to continue his career at this point—if he's physically capable of doing so.
Buffalo was the latest turn for Kolb, who has suffered a star-crossed fate as a pro after starring at the University of Houston. Given the trials and tribulations he has endured, it's hard to envision Kolb carrying on much further in the NFL beyond 2014.