‘Some teams will try to copy the Bills’ formula more directly. The team’s offensive coordinator, Brian Daboll, has become a hot job candidate as teams seek a head coach capable of slow-cooking their incoming or in-house quarterback prospects. By developing Allen over three seasons, Daboll appears to have cut the line in front of the Chiefs’ offensive coordinator, Eric Bieniemy, who helped Mahomes become league M.V.P. in the quarterback’s second season.’