Cornerback Chad Scott (ankle) and linebacker Kendrell Bell (groin) did not participate in Sunday's drills, but Cowher said neither is expected to miss the start of the voluntary coaching sessions that begin May 18.
Wide receiver Plaxico Burress, meanwhile, missed his third-straight day and is in line to be fined $7,000 for sitting out the mandatory drills.
Now, Burress isn't required to be back in Pittsburgh until training camp begins at the end of July.
Cowher hopes to have everybody, including Burress, back in town next week for the voluntary coaching sessions.
"They're voluntary, but we've stressed the importance of being here. There's a lot of new players and a lot of new coaches," Cowher said. "I'm just looking at our football team. I'm really not looking at anyone who's not here. I think it's important you focus on the guys who are here because they're the ones you go to war with."
As for quarterback Ben Roethlisberger's first camp with the team, Cowher came away happy with the first-round pick's performance.
"I was impressed," Cowher said of Roethlisberger. "I was impressed that he wasn't overwhelmed. I was very encouraged by the way he was able to comprehend things. . He's got a strong arm and he's very athletic. You can see that by some of the throws he made on the move out here."
In the team portion, Deshea Townsend picked off a Charlie Batch pass on a post pattern, jumping in front of the would-be receiver.
Strong safety Troy Polamalu, meanwhile, got his hands on several balls, making diving plays to deflect passes at the last moment.
"Troy is really flashing," said Cowher. "I think he's really stepping into a leadership role."
"That's a positive sign," Simmons said.
Kranchick appears to have great hands, but it's always tough to tell when they're not wearing pads and know that nine times out of 10 they won't get hit.