PITTSBURGH — Willie Colon couldn’t help himself. When rookies David DeCastro and Mike Adams walk into the offensive huddle during the opening practice of minicamp on Tuesday, the veteran left guard decided to have a little fun at the expense of the new kids.

“It smells like baby milk and pampers in here,” Colon said just before quarterback Ben Roethlisberger called out a play.

Hopefully, not for long.

The Steelers wasted little time putting their top two draft picks to work during their first drills with the veterans. Both players split time with the first team after missing three weeks of organized team activities while finishing their studies.

Offensive line coach Sean Kugler did his best to keep his two new projects up to speed, calling them daily to go through reps and relay questions that came up during meetings.

Adams — taken in the second round out of Ohio State — would often bring his playbook and his iPad wherever he went during his final days on campus to help fight off boredom.

“To be honest, I’d be in class watching film and stuff like that,” he said. “I kind of checked out of school a while ago, just wanting to be here, getting back with my team.”

While allowing he’s never “satisfied,” coach Mike Tomlin wasn’t displeased with what he saw from either player.

“I’m comfortable with where they are and what they were able to display today,” Tomlin said. “Obviously they’re working on limited time. They need to hurry up to catch up.”

At least they’re here. The same can’t be said for wide receiver Mike Wallace, who has remained in Louisiana during the offseason. The restricted free agent has yet to sign his first-round tender though Tomlin remains optimistic Wallace will be in the fold when camp starts in late July.

“It’s probably short-term misery,” Tomlin said. “Hopefully there will be closure at some point and this will be in our rearview mirror.”

Tomlin won’t have to push Adams to put his college career behind him while he tries to shed the reputation he received during a bumpy four years with the Buckeyes. The massive 6-foot-7, 323 pound Adams was an All-Big Ten selection in 2010 and made the second team last year despite being limited to eight games because of his role in the scandal that eventually led to coach Jim Tressel’s dismissal.

Throw in his failed drug test just before the NFL combine and Adams arrives in Pittsburgh with plenty of baggage to go with his potential.

“I think some people question my ability (as a person) and as a football player,” Adams said. “As long as I do what I’m told and do what I’m taught I’ll be alright.”