The last time Nevada?s sports books failed to win money was in 2008, when the Giants upset the Patriots as 12-point underdogs and they lost about $2.6 million. The only other losing year in the past 20 was 1995, when the San Francisco 49ers were favored by a Super Bowl-record 18 1/2 points over the San Diego Chargers and covered the spread with a 49-26 win.