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The San Francisco 49ers' 3-0 run with backup quarterback Mac Jones has fueled predictable chatter: could a quarterback controversy be brewing once starter Brock Purdy returns from injury? General manager John Lynch doesn't see it that way -- and insists neither does Purdy. 

Lynch went out of his way to quiet speculation about any tension between the two quarterbacks, praising Purdy's temperament and perspective during his recovery from a toe injury, in an appearance with KNBR this week

"I do wholeheartedly believe that Brock is nothing but happy for our team," Lynch said. "He's working his tail off to try to get back, and I think we all feel blessed and fortunate we found a backup who can go in and play like a starter."

Purdy, who started just two of the first five games of the season for the 49ers, has continued rehabbing his injury while Jones leads the offense. Lynch said the young quarterback has remained focused on returning, not on protecting his job.

"A cool quality about Brock Purdy is he's one of the most self-assured people in a very humble way," Lynch said. "It's hard to explain but I think it's one of the things that appealed to us. He's just very confident in his abilities, but he's just a good guy. He's got an incredible amount of humility."

Jones has thrived in the opportunity while guiding the 49ers to wins in each of his starts. The former first-round pick by the New England Patriots -- and one-time draft target of San Francisco coach Kyle Shanahan -- has completed 66.7% of his passes for 905 yards, six touchdowns and one interception through three starts. His steady command of the offense has helped San Francisco stay atop the NFC West while Purdy heals.

While some outside the organization have framed the situation as a brewing competition, both quarterbacks have handled it with professionalism. Jones himself acknowledged after last week's win over the Rams that Purdy remains the starter once healthy, calling his own role temporary.

"They brought me here to play as a backup, and that's my job," Jones said. "Brock's the starter of this team, and right now he's dealing with something. For him to go out there last week and play when you know he probably wasn't at full health, he cares about this team. I'm just trying to get some wins for him so it helps us down the line."

Lynch echoed that sense of calm, noting that the 49ers' locker room is unfazed by outside debate. He credited Jones for how he's embraced the backup role and evolved within the system since arriving in Santa Clara, saying his confidence had been building throughout the offseason and training camp.

Purdy was ruled out for Sunday's Week 6 game against the Tampa Bay Buccaneers, leaving Jones in line for a fourth straight start -- although he was listed as questionable (knee, oblique) on Friday's injury report. But inside team headquarters, Lynch's message was clear: San Francisco doesn't see a controversy — just a deep roster and a healthy situation at quarterback.