A person familiar with the deal says the Philadelphia Eagles have agreed to trade star running back LeSean McCoy for Buffalo Bills linebacker Kiko Alonso. McCoy had an inconsistent season last year after leading the NFL with 1,607 yards rushing in 2013. Incoming Bills coach Rex Ryan has said he wants his offense to rely heavily on a running attack. Buffalo is expected to lose C.J. Spiller to free agency next week. Alonso played college football in Oregon under Eagles coach Chip Kelly. The 2013 second-round draft pick was a contender for NFL defensive rookie of the year. He missed all of last season with a knee injury after while working out in Oregon in July. He is expected to fully recover in time for the 2015 season.