The NFC East champions acquired Sproles in a trade with the New Orleans Saints last month.
McCoy, who was the team's leading rusher in 2013, told FOXSports.com: "Signing Sproles helps me out as a running back. I can go in a game even more fresh because I'm getting less carries and less attempts. I had 366 touches, which is a lot. I think me having less attempts can help me be more productive and more deadly.
"Being fresh in the fourth quarter, things that you don't think matter really do make a big difference. Now defenses have another guy that they have to prepare for. They have to watch out for so many different things, and it's hard. They only get a week to prepare for us."
McCoy had 1,607 rushing yards, 539 receiving yards and 11 combined touchdowns last year.