Speaking at the NFL Annual Meeting on Tuesday, owner Jeffrey Lurie confirmed that theory.
"We've been talking about the asset value of LeSean for a long time," Lurie said, via Philly Magazine, "because he wasn't the style of runner that Chip prefers, but a great player."
"Getting players that fit more of what he's all about in terms of their style of play," Lurie continued. "LeSean McCoy is a great running back -- all-time franchise leader. Great guy in every way.
"To maximize his power-spread offense, (Kelly has) always admired the one-cut runners. That's what he admired. You've got to let a coach try to bring in the players that fit best what he's all about to maximize what he's trying to accomplish."
McCoy's production plummeted from to 2,136 total yards and 5.9 yards per touch in 2013 to 1,474 total yards and 4.3 yards per touch in 2013.
If Murray and Mathews combine for production similar to the more efficient 2013 version of McCoy, Lurie's faith in Kelly's power spread attack will be borne out.