49ers are favored vs. Chiefs on Sunday, but Patrick Mahomes usually wins as an underdog

The 49ers are 1.5-point favorites to beat the Chiefs in Sunday's Super Bowl rematch, but Chiefs quarterback Patrick Mahomes may think that means he has the 49ers right where he wants them.The Chiefs were 2-point underdogs to the 49ers eight months ago in Super Bowl LVIII, but Mahomes led them to a 25-22 win and was named Super Bowl MVP.That was no surprise to Mahomes, who usually wins when the Chiefs are underdogs, with a 10-3 career record straight-up in his 13 starts when the Chiefs were underdogs. In fact, Mahomes' .769 winning percentage as an underdog is almost as good as his career .792 winning percentage as a favorite.Mahomes' strong record as an underdog began in the first start of his NFL career, when the Chiefs started him in place of Alex Smith for a meaningless game in the 2017 season finale. The Broncos were favored by 3 points over the Chiefs that day, but Mahomes led the Chiefs to a 27-24 win.When Mahomes became the Chiefs' starter in 2018, it took the betting world some time to adjust to how good he was, and the Chiefs were underdogs in both Week One and Week Two, winning both games outright. They were also 3.5-point underdogs in Week Six against the Patriots,...