The Broncos started 10 quarterbacks the past six seasons. None of them — Trevor Siemian, Paxton Lynch, Brock Osweiler, Case Keenum, Joe Flacco, Drew Lock, Brandon Allen, Jeff Driskel, Brett Rypien and Teddy Bridgewater — were an adequate replacement for Peyton Manning. Russell Wilson is, which is why the Broncos can’t stop singing the quarterback’s [
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