In a move that shocked the football world, the Philadelphia Eagles have traded Pro Bowl running back LeSean McCoy to the Buffalo Bills in exchange for linebacker Kiko Alonso.

McCoy has the NFL's third-most rushing yards and fourth-most rushing touchdowns since he was drafted by the Eagles in the second round in 2009. He finished last season with 1,319 rushing yards, third-most in the NFL.

Alonso played every defensive snap for the Bills as a rookie and ranked third in the NFL with 159 tackles in 2013.  He finished second in the Associated Press' voting for defensive rookie of the year. He missed the entire season last year due to injury.

The trade cannot be made official until the new league year begins next Tuesday at 2 p.m