Super Bowl LI overnight ratings are big — but not as big as last year’s

NEW YORK (CNNMoney) – Somehow, some way, the New England Patriots won Super Bowl LI on Sunday night, and their big comeback victory may have saved the TV ratings.

The game, which saw the Patriots make the largest comeback in Super Bowl history, brought in an overnight rating of 48.8, according to Nielsen. That’s down slightly from last year, which saw a 49.0 overnight rating, and the year before, which had a 49.7.

Still, it is Fox’s best metered market rating ever, according to the network.

To come up with overnight ratings, Nielsen takes the percentage of households watching in 56 US markets and comes up with an average. A 48.8 means 48.8% of households in those 56 markets tuned into the game Sunday night.

It had appeared for most of the game as if ratings could take a hit due to a less-than-exciting contest, as the Atlanta Falcons dominated the Patriots for the first three quarters.

But then quarterback Tom Brady led the Patriots to a shocking comeback, forcing the game into overtime — a Super Bowl first — and likely keeping many viewers glued to their televisions in the process.

The numbers are subject to change as the day goes on and final viewership numbers are produced.