The Pittsburgh Steelers are down to their final days in Latrobe, and Mike McCarthy is using them to rehearse something far less glamorous than a deep ball or goal-line stand. He wants Pittsburgh to get better at changing the people on the field. After the preseason opener against the Green Bay Packers, one of the details bothering McCarthy was the traffic between plays.

Karl Roser / Pittsburgh Steelers
Steelers defensive coordinator Patrick Graham and head coach Mike McCarthy participate in Steelers 2026 rookie minicamp.
Substitution patterns are the sort of thing nobody notices when they work. A personnel group is called, the correct players sprint on, the previous group gets off, and the offense or defense is ready before the clock becomes part of the problem. When one piece is late or confused, however, a routine change can eat into the play clock or leave the wrong matchup on the field.
Pittsburgh got its first live look at that process Thursday night. The Steelers beat Green Bay 28-9 at Acrisure Stadium, but the game also exposed procedural details that are difficult to reproduce during ordinary camp periods. With a preseason roster constantly rotating players and packages, the sideline can resemble rush hour with shoulder pads.
McCarthy anticipated that challenge before the preseason started. During the opening week of camp, he included cadence and substitution patterns among Pittsburgh's pre-snap fundamentals, warning those details would show up once the Steelers were operating with a 90-man roster in a game environment. Now he has film to show where the process needs work.
During his Sunday media availability, McCarthy explained what he wants to sharpen before Pittsburgh moves deeper into the preseason.
“We’ll have another call-up period just to kind of get in the flow of the game," McCarthy said. "Now that we have one game under our belt, continue to maximize the opportunities of the substitution patterns and so forth. We need to be cleaner there. That was one of the things we want to focus on coming out of last game… [Monday’s] practice will be just all competition, offense and defense. So really want to get these last two padded practices in."
The phrase “substitution patterns” sounds like administrative housekeeping, but the football consequences can arrive quickly. An offense that gets organized late loses time to identify pressure and adjust protection. A defense waiting on a replacement can struggle to match personnel or communicate a check before the snap.
McCarthy has built much of his first Steelers camp around removing those small sources of chaos. Pittsburgh's attention to detail has been a recurring theme, with the new head coach pushing for cleaner execution instead of accepting mistakes as an unavoidable part of August.
Substitutions fit that philosophy because they combine preparation with communication. Coaches have to get the desired personnel called quickly, players have to know which packages include them, and everyone leaving the field has to recognize when his job is finished. The preseason complicates the process because evaluation requires frequent movement through the depth chart.
Thursday provided the messier version of a game simulation. Practice can script situations and reset between periods, but a real sideline has coaches changing combinations while the game keeps moving. McCarthy now has two padded practices to attack what the Packers game exposed.

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Steelers' Will Howard warms up alongside Drew Allar for a preseason game in 2026.
The Steelers' final open practice at Saint Vincent College is scheduled for Monday, and McCarthy said that session will be built entirely around offense-versus-defense competition. That gives him one more chance to create pressure around the operation instead of correcting everything at walkthrough speed. Pittsburgh's official camp schedule confirms Monday is the final open practice in Latrobe.
Competition can make the substitution work more realistic. When the next rep has a winner and loser, players have less freedom to drift through the transition or wait for a coach to rescue the alignment. The offense has to recognize its group, the defense has to respond, and the next snap arrives whether everyone feels perfectly organized or not.
There is no reason to turn Pittsburgh's preseason substitution issues into a crisis after one exhibition game. McCarthy did not describe them that way, and a 90-man roster naturally creates more moving pieces than the 53-man version he will manage during the regular season. August is precisely when a coaching staff wants these flaws to become obvious enough to correct.
Every late-August period devoted to substitutions is a period that cannot be used somewhere else. Putting this issue on the agenda shows how quickly McCarthy wants the operation to become second nature.
Steelers Want The Sideline To Become Boring
A clean substitution should be one of the least memorable moments of a football game. McCarthy would probably be thrilled if nobody mentions Pittsburgh's personnel changes again once the regular season begins, because silence usually means the right players arrived, the wrong players left and the play started without unnecessary drama.
That becomes harder when the Steelers use different offensive packages, defensive fronts and situational groups against opponents trying to create confusion. A fast-moving offense can stress defensive substitutions, while sudden personnel changes can force communication across an entire unit. Pittsburgh's sideline operation has to keep pace with the football happening in front of it.
McCarthy has spent camp obsessing over details because Sundays eventually punish the ones that look harmless in August. The Steelers already received their first warning Thursday, and these final padded practices give them a chance to make the choreography cleaner before the next preseason game against the New York Jets on Friday. Pittsburgh hosts New York on Aug. 21 before finishing the preseason at Buffalo on Aug. 27.
The pads will attract most of the attention during Pittsburgh's final hours in Latrobe. McCarthy is also watching something quieter: who knows when to enter, who knows when to leave and whether the Steelers can change personnel without changing the rhythm of the game. If he gets his way, one of Pittsburgh's final camp improvements will be almost impossible to notice.
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