Perhaps the most intriguing betting story ahead of Super Bowl 54 between the Chiefs and Patriots is the overwhelming [support for the OVER](https://www.betchicago.com/super-bowl-54-betting-over-under). The number opened at 51.5 offshore last week and was bet up to as high as 55 in early trading. As of Thursday, the total sits between 54.5 and 55 on oddsboards throughout the U.S. betting market, with close to 80% of tickets supporting the OVER, per [SportsInsights](https://www.sportsinsights.com/nfl/). Kansas City is a 1- to 1.5-point favorite on the spread. Past market results with total figures this high suggest starting quarterbacks Jimmy Garoppolo and Patrick Mahomes may post higher than expected passing numbers on Sunday, presenting some lucrative prop betting value. __Super Bowl 54 props:__ [Thousands of options](https://www.betchicago.com/super-bowl-54-props-ways-to-bet-49ers-chiefs) | [Action report](https://www.betchicago.com/super-bowl-54-props-betting-sharp-action-odds) | [Cross-sport faves](https://www.betchicago.com/super-bowl-54-prop-bets-cross-sport) ## Jimmy Garoppolo prop picks __Total pass attempts:__ Jimmy Garoppolo, OVER 29.5, -110 __Total passing yards:__ Jimmy Garoppolo, OVER 239.5, -110 The 49ers are 20-5 SU when Jimmy Garoppolo attempts at least 10 passes in a game in his career. He's lost only two of these contests by more than a touchdown. Factor in betting lines, and he's rewarded +6 teaser bettors in 23 of the 25 efforts. The point is, Jimmy G keeps San Fran in every contest, regardless of the opponent. Kansas City owns the highest average betting total in the NFL this season at 50.4 points, and to stay within reach of Mahomes and the Chiefs, a team has to put up a lot of points. The Chiefs, therefore, have a knack for forcing teams to the air. Including the playoffs, opponents have attempted 30 passes or more against Kansas City in all but two games. In seven contests Garoppolo attempted 30 passes this season, the 49ers QB eclipsed 240 yards in six. He's averaging 8.4 yards per attempt. ## Patrick Mahomes prop picks __Total touchdown passes by:__ Patrick Mahomes, OVER 2.5, +110 The average total for the Chiefs with Mahomes as the starting quarterback is 52.1 points. Including the postseason, the reigning MVP leads the offense to 33.8 points per game when the betting number closes higher than this. In fact, the team has reached 27 points in 18 of the 20 contests. Most of the success comes via passing touchdowns. Mahomes averages 3.0 per game in this spot and has hit the mark in 14 overall. The San Francisco pass defense is one of the strongest the reigning MVP has faced in this market scenario, owning the most efficient unit in the NFL at 5.3 yards per toss. Still, Mahomes is up for the challenge. Against the five best passing defenses in terms of efficiency he's gone up against, he's tossed three or more touchdown passes in all but one. *This story was compiled with the help of queries performed at [SportsDatabase](https://sportsdatabase.com/).* __Bookmark us:__ [NFL betting](https://www.betchicago.com/)