NO TIMETABLE FOR NKEMDICHE

The Cardinals signed defensive end Darius Philon in free agency, and he is projected to start alongside nose tackle Corey Peters on the defensive line in 2019. In an ideal world, Robert Nkemdiche would round out the group, but that is far from certain.

The enigmatic former first-round pick made strides last season but then tore his ACL against the Lions in early December. Kingsbury has been impressed with the way Nkemdiche has attacked rehab, but is unsure if he will be ready for training camp.

"He looks great, feels great, but we're going to be smart," Kingsbury said. "He knows he has to maximize who he is this year and have a great year. I really like where his attitude is at, and (defensive coordinator) Vance (Joseph) is excited about him in our scheme and maximizing what he can be."

While Peters, Philon and Nkemdiche figure to be three main pieces, there isn't much depth behind them. Kingsbury acknowledged the need to bolster the group.

"We feel a lot better about what we have right now than we did when we got here, so that's encouraging," Kingsbury said. "But we definitely need more bodies on that D-line as we get through the end of free agency and through the draft."

KINGSBURY EXCITED ABOUT OFFENSIVE LINE

The Cardinals may add to their offensive line in the draft, but Kingsbury seems pretty content with the current group after the recent additions of right tackle Marcus Gilbert, guard J.R. Sweezy and guard Max Garcia.

"Those upgrades we made, we took some big steps there," Kingsbury said "We'd like to have more depth, just like everybody else, and we'll try to do some things from here on out to address that, but from where it was to where it is today is a big step."

There are still some details to work out. Kingsbury declined to say if Sweezy would play right or left guard. Left tackle D.J. Humphries is on the mend from 2018's season-ending knee injury, and while Kingsbury is excited about his progress, it's unknown if he will be back to normal for the start of offseason work.

Kingsbury was mum on if Mason Cole or A.Q. Shipley has the upper hand at center. Shipley started all 32 games in 2016 and 2017 and was projected to do the same last year, but a torn ACL in training camp opened the door for Cole, the rookie third-round pick.