Idk but I'm guessing it's some team app or NFL app for team news or team info. It's probably some app notification for whatever team you select as your favorite team. Look in the play store for some team apps.
T-Mobile 32GB - Rooted (TWRP 126.96.36.199)
Galaxy Note 10.1 32GB 2014 Edition
Galaxy S4 (VZW MDK) sold to pay for my Note 3
Droid Bionic - Traded for Note 3
Droid X - Now a WiFi phone.