ALAMEDA — Derek Carr and Khalil Mack have watched as the Raiders embarked on rebuilding a franchise to their specifications.

Key components to the foundation envisioned by general manager Reggie McKenzie and new coach Jack Del Rio, both second-year players like what they see.

Carr, a 16-game starter as a rookie quarterback, has talked in general terms with offensive coordinator Bill Musgrave, whose system will include no-huddle and up-tempo components similar to what Carr ran at Fresno State.

“It’s cool that they want to take the offense and say, ‘Let’s make it good at what you do,’ ” Carr said Monday, the day before the Raiders begin their offseason conditioning program. “It’s beyond anything I could have dreamed of. If you’d have told me a year ago they were doing things to help me out and build this thing around me, I’d sign up no matter what.”

Mack, who also started 16 games at linebacker and was a season-long force against the run in addition to generating pressure (if not always sacks) against the quarterback, loves the idea of having a head coach as well as defensive coordinator (Ken Norton Jr.) who are former linebackers.

“That’s the part I’m looking forward to the most,” Mack said. “(Jack) has that kind of laid-back spirit … when it gets real, when the guys go off and the fire starts and the intensity goes up, you can sense he’s ready for the moment. I’m ready to play right now. For real.”

Actual football will have to wait, as Tuesday’s activities will be limited to strength, conditioning and building a sense of camaraderie with a dozen new teammates signed as unrestricted free agents plus an almost entirely new coaching staff.

Any throwing Carr does with receivers during this portion of the offseason will be on their own, away from the coaching staff.

For all the new faces, Carr and Mack are expected to be centerpiece players on each side of the ball. Both are eager to assume those roles, albeit in different ways.

A year ago, both players spent extensive time preparing for the NFL scouting combine and then going through the meet-and-greet process heading into the draft. And although the Raiders will change their systems of football on offense and defense, both men feel light years ahead going into Year 2.

“When I came in, out of respect, I couldn’t just be the alpha male, the dominant leader, because it wasn’t my team yet,” Carr said. “I couldn’t assert my leadership role. Now I don’t have to hold back. I can come in and be myself from the beginning and lead our team.”

Mack understands more is expected of him this season but has talked with Del Rio about not wanting to change his personality.

“Jack understands the type of guy I am,” Mack said. “I told him I like to go out and use my actions to speak loudly. He understands that.”

Unrestricted free agent wide receiver Michael Crabtree was reportedly scheduled to visit the Raiders on Monday. Crabtree caught 68 passes for the 49ers last season. The Miami Herald reported that Crabtree rejected a $3 million deal from Miami and is seeking something closer to $4.5 million.