Ray McDonald

The Santa Clara County district attorney's office has declined to file charges against San Francisco 49ers defensive lineman Ray McDonald in a felony domestic violence investigation stemming from his Aug. 31 arrest.

Suspensions to a few key players could impact the fortunes of several potential Super Bowl contenders when the NFL begins its 2014 season this week. Here's what you need to know heading into Week 1.

Police in Northern California say San Francisco 49ers Ray McDonald has been arrested on domestic violence charges.