Quarterbacks coach Zac Taylor will take over play-calling duties, while assistant wide receivers coach Phil McGeoghan is the new full-time wideouts coach, the team announced.
Armando Salguero of the Miami Herald reported interim head coach Dan Campbell made the decision after he "had shown signs of displeasure with the offense in recent weeks."
Jeff Darlington of NFL Network added Lazor's "refusal to establish running game" was among the "biggest reasons" for his exit in Miami.
Lazor, 43, was in his second season running the Dolphins offense. Widely credited with making changes that saw Ryan Tannehill make a major leap in 2014, he has become a fall guy for Miami's offensive nosedive this season.
The Dolphins currently rank 27th in points per game, failing to top 20 points in nine of their 11 games. They rank in the bottom half of the league in nearly every major offensive category; their lone saving grace is a 14th-place ranking in Football Outsiders' offensive DVOA through Week 11. That ranking should take a step back after the Dolphins compiled just 12 rushing yards in Week 12 against the Jets. While Tannehill threw for 351 yards and three touchdowns in the blowout, most of it came in garbage time.
"Offensively, I think we're a fragile team," Campbell told reporters after the loss. "We have to find a way to stay in this and be in the game early. We just do."
At the center of Lazor's ouster is the marked regression from nearly all of Miami's young talent. Tannehill looks headed toward a career high in interceptions, has suffered a 4.3-point drop in his completion percentage compared to 2014 and has all but abandoned using his rushing skills. The downturn comes after Tannehill signed a six-year, $96 million contract that locks him into being Miami's franchise quarterback.
"It's ridiculous," Tannehill said in October, per Darlington. "We have playmakers. We have opportunities. We're just not getting it done."
Rich Gannon of CBS Sports did not agree with the firing:
Rich Gannon @RichGannon12
Miami fires OC Bill Lazor? Amazing how they run that place. What a joke! Poster child for a dysfunctional organization!2015-11-30 14:31:36
Lazor's firing comes more than a month after Miami let go of head coach Joe Philbin. Billed as a guru who helped mold Aaron Rodgers, Philbin's tenure was defined by an inability to develop an elite offense. The Dolphins fired Philbin on Oct. 4 and replaced him with Campbell, who got the team off to a strong start before losing four of the last five games.
Odds are, a full house cleaning is in order before the Dolphins can compete in the AFC East.
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