After the Detroit Lions complete their fifth day of training camp on Monday, they’ll join the rest of the NFL on Tuesday for the first practice in pads. And according to Dan Campbell, tomorrow, they’re rolling.

“This is where you really find out what’s what,” Campbell told reporters. “There’s kind of three different cycles to it. It’s what we’re into now, what we have been, the acclimation, which you guys heard me call the “pajama warriors,” and then you’ll have pads. And it’s like [the] first day, maybe first two days of pads, there will be some guys who show up.”

“And then once you get into the grind of it, you hit the second week, and you get into about four or five days of pads, now you’ll find out who’s, who.”

Campbell also made one thing clear. He expects his players to take their conditioning seriously during this stage.

“We’re not going to be able to do this during the season,” said Campbell. “So if you don’t get it in now, if you don’t condition the body for the pounding, it’s getting ready to take over a 17-week period, and hopefully more than that, then you’re in trouble.”

Several players Campbell mentioned as player’s he’s monitoring for production in some shape or form are Jeff Okudah, Amani Oruwariye, and Jonah Jackson.

Campbell spent extra time talking about Jackson, who’s beginning his second season with the Lions. Campbell noted that when coaching Jackson, he has to remind himself that he’s a second-year player, not a five-year veteran.

The former OSU Buckeye showcased promise last season. Campbell looks for him to be a contributor to the Detroit Lions’ offensive line.

The Detroit Lions kick off their preseason on August 13th at Ford Field vs. the Buffalo Bills.

Follow Kory Woods on Twitter at KoryEWoods.