PITTSBURGH — Mike McCarthy stepped to the podium at Acrisure Stadium on Thursday night, fresh off his first preseason win as the Steelers head coach. As he began answering the first question, he placed two hands on a brand new (and quite wobbly) lectern.“We’re going to fix this,” McCarthy chuckled.It was just about the only thing that went wrong during a night of debuts for the head coach and his two young quarterbacks. McCarthy was hired in large part because of a history of developing successful signal callers. That they were during 28-9 win, combining for 313 passing yards.“It’s a really good quarterback room,” McCarthy said. “I thought they played that way tonight.”Top Plays from Packers @ SteelersStarter Mason Rudolph led a 16-play, 84-yard drive. Second-year pro Will Howard, playing in the preseason for the first time after a pinky injury derailed his rookie season, orchestrated a successful two-minute drill. And Drew Allar provided the exclamation point. The rookie from Penn State led three touchdown drives in his three series. He completed 10 of 13 passes and finished with a passer rating of 154.8 passer rating (not far off from the perfect score of 158.3).“My job as a quarterback is to go out and put up points no matter what the situation is,” Allar said. “I feel like we did a good job of that.”As the rookie trotted onto the field early in the second half, he was greeted by “Drewwwwwww” chants. Three plays later, Allar faced his first test — a third-and-7 from his own 23-yard line. Allar recognized the man coverage and initially looked for the tight end running a crossing route out of a 3×1 formation. When a Packers linebacker took that away, Allar quickly went to his second read.Showing off the way the ball explodes out of his hand, Allar threw with timing and anticipation for rookie wide receiver Kaden Wetjen on a 12-yard dig. Wetjen sidestepped the crashing safety and raced 74 yards before he was tackled at the 3-yard line. Allar punched it in himself a few plays later, keeping the ball on a read-option.After the rushing TD, Allar orchestrated a 10-play, 89-yard drive that ended with a 5-yard touchdown pass to Wetjen. The rookie QB followed that with a 10-play, 63-yard drive, capped by a 4-yard touchdown pass to fullback Riley Nowakowski.“I think it’s a huge confidence boost,” Allar said. “But I think I came into the game confident, just because of the preparation and everything that has gone on the last two weeks down in Latrobe. Then Coach McCarthy and the whole offensive staff putting together a really concise game plan, just calling stuff that they know I’m comfortable with, and just allowing us to go out and play fast.”Sure, it was just the preseason against a defense that didn’t do much to disguise its pre-snap looks, and Allar acknowledged he’ll probably get a minus grade for one piece of footwork on a “crazy reverse on the center exchange.” Still, it was a promising debut that highlighted some of Allar’s upside. Even on a throwaway near the end zone, he showed solid decision making.“I kind of screwed up in the first part of the read,” Allar said. “But you don’t make a bad play worse is something that we kind of always talk about.”Allar executed many of McCarthy’s staple concepts, especially the Dragon (slant/flat) that’s been part of the head coach’s playbook since his first time as a play caller in New Orleans in 2000. Allar also showed his mobility on the rushing touchdown, when he bootlegged to the left and threw on the move for the final touchdown pass. Dinged for his footwork in the pre-draft process, Allar has taken well to the coaching points.Howard’s “peaks and valleys”Howard’s highlights came during a successful two-minute drill just before halftime. McCarthy places a huge emphasis on situational football, especially the two-minute drill. On fourth-and-inches, the head coach dialed up a play-action pass; Howard rolled to his left and found Ben Skowronek for a 17-yard gain.