Alonso finished third in the NFL in tackles last season while leading his team in tackles for loss. Per NFL Media's Research Department, he joined Brian Cushing as the rookies since 1991 to generate at least 100 tackles, four interceptions and two sacks.
Alonso's ACL injury is a particularly severe blow because of Jim Schwartz's plans for 2014. The new coordinator's scheme funnels plays to the weakside linebacker, where Alonso was ticketed this season.
In short, he and Byrd were the two difference-making talents in the back-seven of Buffalo's defense last season.
The quarterback will have to carry a heavier load in 2014, which was our chief concern with the Bills all along.