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All the 49ers have to do is get rid of offensive coordinator Greg Roman and all their problems will be solved.

Right?

That seems to be the feelings of the 49ers’ front office (and certain family members), the team’s right tackle, Anthony Davis, and a loud portion of the 49ers’ fan base.

Roman will definitely not be back with the 49ers next season. He is expected to land elsewhere in the NFL as an offensive coordinator, according to coaching sources. He interviewed for the Tampa Bay Buccaneers’ opening on Friday, according to Fox Sports, and he is likely to be linked to other coordinator openings in the near future.

As one 49ers source told CSNBayArea.com last week, “Why did Roman get all the blame? How about the head coach and the quarterback coach?”

Jim Harbaugh was often referred to as the “quarterback whisperer” after Alex Smith experienced his most productive seasons in the NFL after Harbaugh and his staff took over in 2011. He received most of the credit. But, this season, the blame fell squarely on Roman.

[RELATED: Rex Ryan, Mike Shanahan were fans of 49ers' Colin Kaepernick]

While Harbaugh oversaw the entire team and Roman held the title of coordinator, it was the job of quarterbacks coach Geep Chryst to work most directly with Kaepernick, whose production in the passing game took steps backward every season.

The 49ers' next offensive coaching staff has a chore ahead of it to develop Kaepernick into an effective pocket passer. After all, regardless of running ability and arm strength, every NFL quarterback must be able to thrive from the pocket to achieve consistent success.

The next coach must put together a coaching staff that can work with Kaepernick to get him proficient at not only reading defenses but recognizing, based on the play call, where there will be open targets downfield. One 49ers source said Kaepernick routinely did not quickly identify open receivers, leaving a lot of big plays that went unrealized this season.

Former 49ers quarterback Jeff Garcia recently said he believes he can provide assistance to Kaepernick. After spending the past season as a quarterbacks coach in the Canadian Football League, Garcia is currently mentoring young quarterbacks as an independent coach.

“You have to incorporate the mental side," Garcia said. "We can always be better mentally. We can understand defenses better. We can understand what our offense is trying to do. How we’re attacking defenses. I’d definitely want to go over film with him, and talk about decisions he made, talk about decisions he didn’t make, and how he can improve decisions on the field.”

The 49ers' list of candidates for the job include a majority with defensive backgrounds.

Josh McDaniels, Mike Shanahan and Adam Gase can bring in their own offensive thoughts to the 49ers. Also, Baltimore Ravens offensive coordinator Gary Kubiak could emerge as a strong candidate, too.

On the defensive side, Vic Fangio, Rex Ryan, Dan Quinn, Teryl Austin and Todd Bowles are known candidates. The 49ers are also believed to be giving serious consideration to Jim Tomsula.

The defensive coaches mentioned must impress the 49ers’ search team of CEO Jed York, general manager Trent Baalke and president Paraag Marathe with their vision on offense – and, specifically, for Kaepernick.

Here are some offensive assistant coaches who could be on the list to join the 49ers if the organization hires a defensive-minded head coach:

--Scott Linehan, the Dallas Cowboys’ passing game coordinator, is not under contract for next season. He took over the team’s play-calling duties from offensive coordinator Bill Callahan and has thrived in that role. The Cowboys ranked seventh in the NFL in total offense and were fifth in points scored. Linehan does a great job as a play-caller of mixing run and pass.

--Dirk Koetter figures to be a hot commodity after the Atlanta Falcons fired coach Mike Smith. Koetter was head coach at Boise State and Arizona State from 1998 to 2006. He was Jacksonville’s offensive coordinator for 2007 to 2011, and he was Smith’s offensive coordinator with the Falcons the past three seasons. The Falcons’ offense ranked eighth in the NFL in total yards and 12th in scoring.

--Marc Trestman, the recently fired Chicago Bears coach, is known to be very good working with quarterbacks. He is somebody who can work tirelessly with Kaepernick in the film room. Yes, his tenure as 49ers offensive coordinator ended in ruthless fashion when former Eddie DeBartolo enunciated, “He’s gone.” But the 49ers’ offense could be in good hands with the announcement, “He’s back.”

--Rob Chudzinski got a lot out of his talent in two-year stints as offensive coordinator with the Cleveland Browns (2007-08) and Carolina Panthers (2011-12). Chudzinski, 46, was hired by Indianapolis Colts coach Chuck Pagano as "special assistant" this season when he was fired after just one year as Browns head coach.

--Brad Childress, 58, parlayed his success as Philadelphia Eagles offensive coordinator into a head-coaching job with the Minnesota Vikings. He was coming off back-to-back division titles when he was fired after 10 games in 2010. He has spent the past two seasons as Kansas City Chiefs' spread-game coordinator, which could be attractive experience for the next 49ers' offensive coordinator.

--Norv Turner. I’m not sure if this can happen or how this can happen, but his return to the 49ers would certainly be reason for excitement. His comments last week to the Minneapolis Star Tribune suggests he plans to remain as Vikings offensive coordinator to work with quarterback Teddy Bridgewater. “I signed a three-year contract when I came in here,” Turner said. “So I’m kind of a guy who when I make a commitment, you believe in it. This was a demanding year, a challenging year. But it was a lot of fun. I like working with [coach] Mike Zimmer. … We can build something here that can be good for a long time.”