Young brothers Nick and Theo Kennedy love watching football on Sundays, but the afternoons are anything but relaxing. When the Patriots are on, the TV in their Westwood living room is tuned to that game, but they regularly flip to the NFL’s RedZone, a live highlights channel, and each boy constantly checks his tablet, monitoring ESPN for updates on more than 50 players leaguewide.

“They look like bookies,” said their mother, Kimberly Kennedy.