49ers’ unproven linemen get off to a good start

Seattle industrial-size defensive tackle Al Woods is listed on the Seahawks roster as 6-foot-4 and weighing 330 pounds.

But San Francisco 49ers rookie right guard Spencer Burford asked the same question as so many after spending several days last week studying video of the hulking 12-year-old veteran: How much does he weigh? he really?

Unlike most, Burford had a way to get the answer: The fourth-round pick popped the question to Woods, 35, on the field in the 49ers’ 27-7 win on Sunday.

“He’s a very big individual,” Burford said. “I asked him how much he weighed during the game. And he said a pretty heavy number. I’m not going to put his business there like that, but, yeah, he’s a great human being.

Burford wouldn’t confirm the number off the record, but he can confirm it: Woods isn’t so tall he can’t be pancake at the goal line.

Burford drove Woods – all 330+ pounds of him – on the back on quarterback Jimmy Garoppolo’s 1-yard shot that provided the final score in the 49ers victory.

Their last powerful offensive snap was a fitting way to cap off a performance from Burford, left guard Aaron Banks and center Jake Brendel, suggesting training camp concerns about the 49ers’ interior offensive line may have been overblown.

Yes, it’s early days, but initial returns are better than expected from a trio that entered the season with three career starts, all by Brendel, 30, an undrafted free agent on his fifth team. Consider: The 49ers have allowed three sacks — only six teams have allowed fewer — and rank fourth in the NFL in rushing (182.5 yards per game) with an average of 4.5 yards per carry.

Although they played without top running back Elijah Mitchell for six of eight quarters, they opened the season by rushing for 175+ yards in consecutive regular-season games for the first time since September 2018.

This is why a highly guarded member of the interior was celebrating late Sunday afternoon. Burford raised his arms, a nod to his fraternity at Texas-San Antonio, after flattening Woods, a block that helped Garoppolo fall in the end zone.

“I have to shout my brotherhood every time,” Burford said. “Omega Phi Psi Fraternity Inc., the greatest fraternity known to man. Every time I throw the hooks, I shout out to all the guys out there.

The trio of Burford, Banks and Brendel will face tougher tests in the final 15 games of the regular season after allowing just one QB pressure against Seattle and no sacks in the first two games.

The toughest examination of the season could come on Sunday when they face the Broncos, whose interior is headlined by nose tackle DJ Jones, who signed a three-year, $30 million deal in March after spent his first five seasons with the 49ers.

Banks regularly faced Jones in training last year. But the 2021 second-round pick has since improved after playing just five snaps as a rookie. After a shaky pre-season, it appeared Banks could be replaced by sidelined Daniel Brunskill once the four-year veteran recovers from a hamstring injury. But it now looks like Brunskill will return to a substitute role when healthy.

On Sunday, Banks met with Jeff Wilson to celebrate after the running back ran through a huge hole on a 16-yard run.

“I was really happy with him in those first two weeks,” head coach Kyle Shanahan said of Banks. “I think he took a step forward in Week 1 compared to pre-season. And I think he even took a step forward in Week 2. … I thought he had one of our best games on offense and he did a hell of a job.

Burford acknowledged it’s far too early to celebrate, but said unconfirmed members on the inside aren’t surprised by their departure. He noted that some of the summer’s criticism came as they found their way into training camp practices against one of the NFL’s top defensive lines.

“We never doubted it,” Burford said. “You can never let outside noise enter the room. It’s like, what are you supposed to do? Believe what they say?

Eric Branch covers the 49ers for The San Francisco Chronicle. Email: [email protected]: @Eric_Branch