Elway built the SB championship team almost entirely through FA. Manning, Talib, Ward, Ware, Sanders, etc. But, he sucked bad at drafting, especially in the first & second round where teams normally find their best starters:
2014 first, second and third: Bradley Roby*, Cody Latimer*, Michael Schofield*; 2015: Shane Ray*, Ty Sambrailo*, Jeff Heurman*; 2016: Paxton Lynch*, Adam Gotsis, Justin Simmons*; 2017: Garrett Bolles, Demarcus Walker, Carlos Henderson*.
* Already Gone of Will Be Released This Off-Season.
Eliminate the players who were cut or not re-signed this off-season: that leaves Walker, who can't get on the field and might not make the team, Gotsis, and Bolles out of the top 9 picks the last 3 years drafts.
That is why the Broncos suck. No depth because Elway screwed up the draft year after year. Last year was better but that cupboard was pretty barren, and it still is pretty thin. They could decide to re-sign Jeff Heurmann but we all hope not. They need a lot better than him.