49ers (1-1) at Broncos (1-1) When: 6:20 p.m. MT, Sunday Where: Empower Field Radio/TV: 850 AM, 94.1 FM/KUSA-9 Broncos-49ers series: Broncos are 7-7 in 14 regular-season games dating back to 1970; the Broncos lost 20-14 in the last meeting, on Dec. 9, 2018, at San Francisco. The 49ers also trounced the Broncos in Super Bowl XXIV, 55-10, on January 28, 1990. That game remains the biggest blowout in Super Bowl history. Key matchup 49ers receivers vs Broncos secondary Jimmy Garoppolo has three bona fide weapons at wideout in Brandon Aiyuk, Jauan Jennings and Deebo Samuel, the latter of whom can…