He made very clear after the Pittsburgh Steelers' 20-7 win over the bumbling Cleveland Browns that whatever nostalgia he experienced Sunday shouldn't be mistaken for Keisel giving serious thought to retiring after more than a decade of playing in the NFL.
"I'm not saying it's over for me at all," Keisel said. "I still feel like I can play and we'll see."
Keisel and Clark are in remarkably similar situations.
Each just finished his 12th NFL season and each has to make a minimum of $955,000 next season per the collective bargaining agreement regarding veteran salaries.
Like Clark, Keisel is aware of what has happened in recent years with the Steelers either releasing or not re-signing defensive stalwarts such as linebackers James Farrior and James Harrison, defensive end Aaron Smith and nose tackle Casey Hampton.
If Keisel is the next to go he at least went out in memorable fashion.
He recorded a sack and a forced fumble on the same play early in the game. Keisel then delivered what had become one of his signatures after dropping a quarterback. The avid outdoorsman mimicked shooting a bow and arrow after sacking Jason Campbell, and he had the presence of mind to not drop to his knee and avoided getting a taunting penalty.
"I had to shoot one more," Keisel said. "I'm glad I had the opportunity."
He would love nothing more than to get more opportunities with the Steelers but Keisel is well aware that he could soon confront a dilemma that others such as Farrior, Smith and wide receiver Hines Ward faced before him: retire as a Steeler or try to extend his career elsewhere.
Keisel can't imagine wearing another uniform and he loves Pittsburgh so much that he and his wife plan to raise their family here. But he is also an admitted competition junkie so walking away from football won't be easy, especially since Keisel still feels like he can still play.
If he suited up for the final time as a Steeler on Sunday, he didn't leave anything to chance.
Keisel gathered the defensive linemen before the game and told them to savor the moment because it would be the last time they would all play together with change inevitable after every season.
Keisel -- and the linemen who see him as their unquestioned leader -- then helped a defense stymie the Browns and keep them off the scoreboard until the waning minutes of the game.
"It was emotional," Keisel said of is meeting with the linemen, "but I'm just proud to be a Steeler and proud to have helped finish this thing strong. You never know what's going to happen. But it's a great feeling to come off the game with a big win. I'm a happy camper."