Taylor, a former sixth-round pick by the Baltimore Ravens, signed with the Bills in March. In his first four seasons, Taylor has played in 14 games, completing 19 of 35 passes for 199 yards, with no touchdowns and two interceptions.
The Bills acquired Cassel in a trade with the Minnesota Vikings in March, and drafted Manuel with the No. 16 pick in the 2013 draft. However, Taylor outplayed both Cassel and Manuel this preseason. In three games, Taylor completed 24 of 31 passes for 236 yards and rushed for a touchdown.
Buffalo, in its first season under head coach Rex Ryan, opens the regular season at home on Sept. 13 against the Indianapolis Colts.
- Rohan Nadkarni