The 6-foot-2, 240-pound Lambert will be at Northwestern for the Oct. 8 game against Michigan. He is also looking into official visits to Nebraska, Oklahoma, Alabama and Iowa, but he doesn't consider it a top five because the process is fluid, and home-state Rutgers is heavily in the mix despite not being on his official visit list at this time.
"I didn't (cut) my list yet," Lambert said. "Other schools can get involved. Those were some of the schools I wanted to visit."
As for Rutgers, a program he has visited several times, Lambert said, "I'm definitely high on them."
Lambert had tentative plans to visit Alabama for the Crimson Tide's Sept. 3 opener, but a change in Timber Creek's practice plans caused him to postpone the trip to an undetermined date. Lambert added his recruitment slowed down when practice began last week.
"I just got out of camp so I haven't talked to many coaches," Lambert said. "Not much is going on (with recruiting)."
Much of Lambert's focus is on his senior season, and being the anchor of what should be a formidable front seven with class of standouts Greg Webb at defensive tackle and Dajaun Drennon playing defensive end.
That front seven should allow Lambert to have another huge season. He made 112 tackles, including eight sacks, and intercepted a pass as a junior.
"We're going to be great," Lambert said. "It's probably going to be one of the best defenses I've played with. They are very hard working and very good. I think they may make a bunch of plays."