Sling TV on Apple TV
Sling TV is one of the first apps that people who cut the cord sign up for. With access to ESPN and a host of other content (CNN, Disney, HGTV, AMC, & TNT), it makes for an easy cable alternative. With a recent addition of an Apple TV app, this is the perfect way to watch football as we get closer to the season. They currently have a promotion where you can get an Apple TV 4 for $90 when you prepay for three months of Sling.
Sling is also available on iOS so you can watch live TV on the go. Pricing starts at $20/month, and you can add-on some extra channels for an additional fee (SEC Network is available for $5/month).