Baltimore Ravens fans might have another reason to cheer for a sack of the opposing teams' quarterbacks this season -- free Big Macs.

McDonald's is offering the promotion through its McD App mobile app.

Mac for Sacks kicks in when the Ravens defense makes a sack for the first time in the game. All McD App users in the Baltimore area will be notified and get a digital coupon to redeem for a Big Mac the next day. The promotion applies at participating McDonald's restaurants and is valid through 11:59 p.m. the day after the game.

"Knowing the long legacy of the Baltimore Ravens defense, we believe we’ll have a lot of Ravens fans enjoying complimentary Big Macs this season," said Jeff Taylor, local Baltimore McDonald’s owner and president of the McDonald’s Family Restaurants of Greater Baltimore Co-Op.

Baltimore is one of the first markets where McDonald's is launching the new app, which is available for iPhone- or- Android-powered devices.

lorraine.mirabella@baltsun.com