SAN FRANCISCO vs. KANSAS CITY at Las Vegas Sunday, 6:30 p.m. EST, CBS OPENING LINE: 49ers by 2 1/2, according to FanDuel Sportsbook. The 49ers lost their two previous trips in the 2019 and 2012 seasons and haven’t won it all since 1994.. San Francisco’s 38 playoff wins are the most in NFL history.. Four of the previous seven won …