Tomlin said the two offensive linemen injured during Sunday's loss in Denver should be able to play this week.
Right guard Ramon Foster was playing well Sunday night before leaving in the middle of the second quarter with an optical migraine that caused him double vision.
"It appears to be a non-issue moving forward," Tomlin said of Foster's vision.
Right tackle Marcus Gilbert left Sunday's game after hyperextending his knee with 2:56 left in the first half. He was replaced for the remainder of the game by rookie Mike Adams, who played well until giving up a sack on the Steelers' final possession while trailing 31-19.
"He had some trouble late at the extreme end of the game, as we all did," Tomlin said. "But we were in dire circumstances and somewhat one-dimensional of course. It was a good start for him."
"He worked out yesterday," Tomlin said of Harrison. "He'll practice or run (Wednesday) and we'll use the same protocol as last week."
Harrison will work and the medical staff will monitor his recovery. "We'll let that be our guide," Tomlin said.
Tomlin said of the loss in Denver, "We did some good things. The quality of our execution waned down the stretch. We didn't make significant plays. Denver did."
Specifically, Tomlin praised his specialists, Shaun Suisham for kicking 21 and 35-yard field goals and kicking all five of his kickoffs out of the end zone and Drew Butler for his 40.0 net and the punt he dropped inside the 5-yard line.
Tomlin was also happy with Antonio Brown's 23-yard punt return. As for the offense and defense, Tomlin found positives "but not enough."
Specifically, Tomlin was unhappy with the Steelers' second-half run defense against the Broncos' no-huddle offense, against which the Steelers ran their nickel alignment with cornerback Cortez Allen replacing nose tackle Casey Hampton.
As for the Steelers' own running game, which averaged 2.9 yards per carry in heavy usage, Tomlin said "I think we're capable of better." As for the rotation in the backfield Tomlin would say only that Jonathan Dwyer "will probably get an increased opportunity."