Blocking is in Kevin Pyne’s blood.

Three generations of Pynes planted three fingers on the line of scrimmage in professional football. Kevin’s great-grandfather George Pyne Jr. played for the Providence Steam Rollers in the 1930s, his grandfather George Pyne III played for the Boston Patriots in 1965, and his uncle Jim spent eight years in the NFL with the Buccaneers, Lions, Eagles, and Browns.

His father, David, was an All-American tackle at Lafayette College. His two older brothers block, David at Tufts, and Austin at Lawrence Academy, where he is about to begin his senior year.

While Kevin’s stature — 6-foot-7, 265 pounds — says he has been ready for high school football for quite a while, he will finally get to show his chops this fall when he hits the gridiron at left tackle for Millis High.

But gone are the days when linemen could rely on size alone to be effective in the trenches. Today’s fast-paced offenses force linemen to keep their size, but build up their speed.

“I’m learning a lot,’’ Pyne said. “It is a big step up from middle school. I’ve been working on my conditioning all summer with my brother, so I think I’ve gotten myself ready for football season and I’m in really good shape.’’

Pyne is learning on the fly this fall as he not only makes the jump from middle school to varsity football, but also picks up a new no-huddle offense that Millis is incorporating.

“It’s up-tempo,’’ Pyne said. “There is not a lot of time between each snap. You have to be ready to go.’’

“He comes from a football family, so it’s obvious we are getting Kevin where he has a good foundation,’’ Millis coach Dana Olson said. “We are trying to build off of that. He’s an athletic kid for 6-7.’’

The offensive line will be a key component for the Mohawks, with All-Scholastic running back Josh Pierre-Charles graduating after a 7-4 season and a loss in the Division 6 South final to Mashpee. Millis still plans on having a strong ground attack as it has in seasons past.

“We are a power running football team,’’ said Olson, entering his third season as head coach. “We base our offense around our offensive line.

“Over the past four or five years, we have drawn big physical kids. If we can’t push people around, then we aren’t going to be able to run the football.’’

If Millis builds its offense on the back of its offensive line, then the center of Millis’s offense runs accurately through center and senior captain Danny Fallon.

Fallon has made it a point to make sure his fellow linemen are in the best shape they can be when the Mohawks open up against last year’s Division 4 state champs Holliston on Sept. 9.

“We did a lot of conditioning and a lot of training to prepare for the no-huddle,’’ said Fallon, in his second year as snapper but running the no-huddle for the first time. “As a whole, the line is in good shape. It has been a challenge at some of the first practices because we aren’t used to it. It is a lot of hand signals. But the QBs are settling into it nicely.’’

Fallon takes over as the head of the offensive line after playing last season next to his older brother, Peter, who is now at Villanova.

“Growing up with him and playing next to him, we always trained together, and he has always been a mentor to me,’’ said Fallon, who clocks in at 6-foot-1, 260 pounds.

Now Fallon becomes the mentor for some of the younger linemen on Millis, like Pyne.

“I feel extremely comfortable in my role this season,’’ Fallon said. “The guys know they can rely on me if they need help with something.’’

Much like Danny and Peter Fallon, the Pyne brothers have upped their game by training together.

Kevin reflects on running drills with David and Austin in the backyard in Milford, working out and occasionally strapping on the helmets for some backyard hitting. Older brother Austin says the focus this summer was on conditioning.

“My brother and I have been doing a lot of road work, a lot of running and agility stuff,’’ Austin said. “The game is changing now, linemen have to be more mobile and faster.’’

Despite being a senior, Austin is also part of a new team and learning a new offense this fall. After beginning high school at Milford High, he went on to Cushing Academy, which dropped its football program after the 2015 season. So Austin moved to Lawrence Academy, where his brother David graduated from in 2015.

At Lawrence Academy, the 6-foot-4, 280-pound right guard joins an offense known for big, physical offensive lines. Pyne will also be blocking for highly touted running back A.J. Dillon, who has verbally committed to Michigan.

“A.J. is an awesome back,’’ Pyne said. “It is going to be fun to block for someone as good as he is. I’m excited. I’m still adapting to the new offense. I was in the spread last season.’’

The key to being a successful lineman given today’s faster pace, according to the middle Pyne brother, is flexibility and adaptability.

“As lineman you’ve got to hit the weight room and get big, but you have to be quick and quick off the ball,’’ he said. “When you are blocking linebackers, you have to be able to run with those guys and keep up with them. The training is tough, but we enjoy it.’’

Michael McMahon can be reached at mcman92@gmail.com.