The Buffalo Bills (3-2) host the San Francisco 49ers (1-4) this Sunday at New Era Field, which puts the spotlight back on one of the NFL's biggest storylines from last season: Chip Kelly's decision in March of 2015 to trade running back LeSean McCoy.
A year-and-a-half later, it's clear that not only are the Bills the biggest beneficiaries of the trade, but Kelly, now the 49ers' coach, is the biggest loser from the swap that sent McCoy to Buffalo and linebacker Kiko Alonso to the Philadelphia Eagles.
Before dumping McCoy, the Eagles' all-time leading rusher, in one of the franchise's most important decisions of the past decade, Kelly had gained some footing in Philadelphia.