49ers Mailbag: Is Nick Bosa or Quinnen Williams pick at No. 2?

Most of the questions have been answered through the first couple weeks of the new league year.

What are the 49ers going to do about a stack linebacker? Kwon Alexander.

What are they going to do about the defensive backfield? Jimmie Ward and Jason Verrett.

What are the 49ers going to do about an edge rusher? Dee Ford + draft.

What are they going to do at wide receiver? Jordan Matthews + draft.

And that’s a good jumping-off point for this edition of 49ers Mailbag with questions that were submitted via Facebook.

So far there is no No.1 WR on our team. Do you see a signing? (Manoj Chopra)
How likely are the 49ers to go after the top WR in the draft? (Brian Lampson)
Free agency is probably the least-effective route to get route-runners. Coach Kyle Shanahan seems to like Matthews, whom the 49ers signed to a one-year contract.

One thing that's been proven is that teams do not need a No. 1 wide receiver to win championships. The 49ers have a darn-good tight end. George Kittle is the 49ers' No. 1 receiver. They just need a good balance on the outside to enable Shanahan to run his offense.

The 49ers had no interest in Antonio Brown. They wanted Odell Beckham. If they can get a receiver, such as A.J. Green, they would certainly pursue that option. A "No. 1 receiver" is not necessary for success, but an upgrade is an offseason goal for the 49ers.

Matthews joins a receiving corps that includes Dante Pettis, Marquise Goodwin, Trent Taylor, Kendrick Bourne and Richie James.

The 49ers traded the Nos. 59 and 74 picks last year to move up 15 slots to select Pettis. He should be a starter. All the other spots are wide open. The 49ers could use the No. 36 pick on a wideout.

Some team will over-draft D.K. Metcalf. That’s probably just fine with the 49ers. There should be plenty of options available when the 49ers pick in the second round. A.J. Brown and Deebo Samuel are legitimate options.

Do you think the Niners will keep both CJ and Mullens? If not what are realistic trade value and landing spots for them? (Jason Massey)
Although the 49ers have reason to like both Beathard and Mullens, it is difficult to believe that either has significant trade value around the NFL.

The 49ers’ roster is better. The depth is better. So, although it makes sense to keep both quarterbacks on the 53-man roster behind Jimmy Garoppolo, it becomes more difficult to retain a third QB at the expense of a player at another position.

That said, I think the 49ers will find a way to keep those three QBs in the building this season. Of course, they hope that Garoppolo remains healthy and they never again need to see Beathard or Mullens on the field.

What record would the Niners need to have to consider Lynch and Shanahan safe? (John Sheffer)
There is no answer to that question. Coaches and GMs are rarely fired only because of their records. There are many other factors.

Coaches are fired when people lose faith in them. They are fired when things get bad in the locker room and throughout the organization. That's when ownership determines a change is needed to get the organization rolling in the right direction.

It’s not the record. It’s how the team got to the record. Did the team underachieve? Were there coaching reasons why the team did not win an extra couple of games? For instance, the 49ers won four games last season. If I had told you before the season that the 49ers would win only four games, you would have thought one thing about the coaching staff. But if you then learned about the injuries, then you would realize that the record was, by and large, unavoidable.

Does Joe Staley retire after this season? Are the 49ers actively looking for a replacement? (Eduardo Sanhueza)
My guess is Staley plays two or three more seasons. The replacement at left tackle might already be on the roster. His name is Mike McGlinchey. As far as the next in line to then take over at right tackle, that would be Shon Coleman. The 49ers could add help for the offensive line, but that would likely be a Day 3 pick in the draft.

What is Kyle thinking about carrying 4 RBs into the season? (Leighton Pahukula)
It’s all about depth.

Running backs take a pounding, so a team can never have too much depth – as the 49ers found out last season.

If Jerick McKinnon, Tevin Coleman, Matt Breida and Raheem Mostert remain healthy, then Breida would likely be the odd-man out. Despite how well he played last season, Breida will have a difficult time breaking into that top three during the regular season. Of course, there is no guarantee that McKinnon will be the same player Shanahan envisioned in his offense before his ACL injury a year ago.

[RELATED: John Lynch reveals details of Odell Beckham Jr. trade talks]

Mostert will suit up for every game because he is one of the best special-teams players in the league. The No. 3 running back must contribute on special teams, and that’s Mostert’s forte.

Breida is a great insurance policy.

If they keep the pick is it Bosa or Williams? (Christian DeMeglio)
Nick Bosa.

There.

That was easy.