Denver Post Broncos writer Ryan O’Halloran posts his Broncos Mailbag weekly during the season.

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Compare and contrast Case Keenum‘s year with the Minnesota Vikings in 2017 versus last year with the Denver Broncos: The play calling, the types of plays called, surrounding skill players and the offensive line. Did the Broncos’ coaches utilize Keenum’s skill set in the best way possible? Will the new offensive coaches utilize Joe Flacco any better? As you might guess, I’m a big proponent of coaching to match the players’ skills. Vance Joseph and Bill Musgrave failed in that regard, I believe. Your thoughts?

— David Brown, Lenexa, Kan.

A lot to unpack here. Let’s start with Keenum’s 2017 with the Vikings. He had a career year — 11-3 record (most wins), 22 touchdown passes (ditto) and a 98.3 rating (highest). For the Broncos, he was 6-10 with 18 touchdowns, a career-high 15 interceptions and an 81.2 rating. The Real Keenum is somewhere in between those two statistical packages, if not closer to the Broncos. Basically, he came back down to where he was pre-2017. That’s why the Vikings chose not to re-sign him. A look at the ’17 Vikings and ’18 Broncos revolves around one thing: Minnesota gave up only 252 points; the Broncos allowed 349 points. Too often, Keenum had to chase the game, a product of a poorer defense, but also poorer game management (turnovers) on his part to help stake the Broncos to a lead. His interception percentage jumped from 1.5 to 2.6 percent. As for how the Broncos used him, I do believe his knee injury in October played a role in not moving him out of the pocket too often. But I disagree with the opinion that Musgrave was too committed to spreading the field out with three-receiver personnel. The Broncos gave it a shot with Keenum, didn’t like what they saw and have moved on to Flacco.

By trading for Joe Flacco, the Broncos have pretty much assured us they’re going to trade up to the No. 5 spot this year, ahead of the Jaguars, to take Drew Lock. Flacco is not the answer at quarterback. He’s the tutor. (And a way to help sign a couple of free agents.)

— Dan, St. Louis

Wow! Didn’t expect to see this scenario and hadn’t given it any thought until Dan chimed in via email. The Broncos currently have the No. 10 pick. Tampa Bay currently holds the fifth pick. In my mock over the weekend, I had the Buccaneers taking Alabama defensive tackle Quinnen Williams. If anything, the Flacco trade means the Broncos should be in trade-down mode. They need to add players, not give away picks to move up for a quarterback. Trading up five spots would cost them this year’s second-rounder and maybe next year’s first-rounder. Not exactly the way to build a roster. Also, I can’t see Flacco as this master free-agent recruiter. Guys go for the money, period.

Hey Ryan, so now that Denver’s gone with Joe Flacco, how does John Elway approach the draft?

— Mike, Castle Rock

I got into it a little bit in the previous question and in Sunday’s newspaper. With Flacco in the fold, the Broncos believe they have properly addressed their starting quarterback for 2019 and maybe even 2020. I emphasize: That’s what they believe. If the Broncos need cornerback help in Round 1, they could trade down to No. 13 (Miami) or No. 15 (Washington) and still get one of the top corners. How I would approach the draft: Cornerback (after a trade down), quarterback and offensive line in the second round and then offensive line in rounds 3-4.

I love the Vonster. I want Von Miller to be a Bronco for life. But is it fair to keep him on a team that will struggle to be .500 the next few years if we could trade him to a contender and receive two first-round picks? That could give us a legit chance to be a dominant team over the next 2-10 years (with our existing young talent)?

— Chris Zavala, Dallas

Von Miller said last month after a Pro Bowl walk-through that he wants to be with the Broncos “forever.” I do think it’s important for Miller to be a one-team guy who will be identified with the Broncos and only the Broncos after his career, which is on track for Canton. But fair has nothing to do with it. Sorry for being blunt. This is business. Trading Miller this offseason would be bad business and result in a $19.375 million “dead” salary cap hit per Over The Cap. If the Broncos struggle again in 2019 and want to acquire some high-end draft picks, they would have an $11.75 million “dead” cap hit in 2020. If the relationship falls apart, next offseason would be the first time to explore that. As for the price Miller could command, the package paid by Chicago to Oakland for Khalil Mack started with two first-round picks.

Where does Su’a Cravens fit into the 2019 Broncos defense? I understood that he was acquired to bring some coverage speed to our dime linebacker package, but don’t recall seeing him used much last year. Does Brandon Marshall’s departure signal a bigger role for Cravens?

— Patrick, Louisville

We don’t know if Cravens fits at all. He should look at the new defensive brain-trust of coach Vic Fangio, coordinator Ed Donatell and secondary coach Renaldo Hill as a way to salvage his career. Cravens was shut down after the preseason (knee surgery). He played five games (117 snaps) before Vance Joseph saw enough and made him a healthy scratch for the final three games. The Broncos could cut Cravens and create $850,000 of cap space. I’m not sure Marshall’s impending release has an impact on Cravens’ role as much as it creates roster space for the Broncos to acquire another dime linebacker. Related Articles O’Halloran: Broncos trading for Joe Flacco will be a boon behind the scenes — and bring a sigh of relief for Vic Fangio

Kiszla: When it might be tempting to ask out of Denver, linebacker Von Miller pledges he’s all-in with Broncos

Rich Scangarello explains Broncos’ new offensive vision

Not really a question, more so a statement. Tell your fan base out there to settle down and take a deep breath, they are getting a VERY UNDERRATED, FINE QB. Flacco got the shaft here with poor offensive drafting and over-the-hill free agents. Once the Ravens traded receiver Anquan Boldin (Flacco’s go-to guy), they NEVER replaced him. They did away with the alpha-males in the locker room because it hurt coach John Harbaugh’s feelings when folks didn’t agree with him. Gary Kubiak was the best thing that happened to Flacco (in 2014), and if Denver follows that blueprint, nothing but success will come its way. It starts with the offensive line — protect him and open the holes for the backs. Although, I am a Ravens fan, I wish Flacco and the Broncos the best.

— Nick Caprio, Baltimore, Md.

Within this comment is a key point for Broncos fans. In 2014, Kubiak, after being fired as Houston’s head coach, joined the Ravens as offensive coordinator. Flacco threw a career-high 27 touchdowns, his 91.6 passer rating was the second-best of his career and his plus-15 TD-to-INT ratio was tied for his best. It came after a 19-touchdown, 22-interception season. The Ravens went 10-6 in 2014. Kubiak is from the Mike Shanahan Offensive Tree. New Broncos coach Rich Scangarello worked three of the last four years for Kyle Shanahan.