The current opposition for Kunitz is Nashville Predators center Mike Fisher, who played for the Senators in 2007. The best-of-7 series is tied 2-2 with Game 5 in Pittsburgh on Thursday (8 p.m. ET; NBC, CBC, SN, TVA Sports).
Pronger, who is five years older than Kunitz, chuckled at how things have come full circle.
"It's very rewarding to see [Kunitz] still going and looking for his fourth Cup," Pronger said. "It's exciting to see that. You see a guy like Mike Fisher, who hasn't been back there in 10 years.
"You look at (Ryan) Getzlaf and (Corey) Perry and their second year as professionals, and they win the Stanley Cup. You talk to people and they think it's easy. Then you talk to them, and they still haven't gotten back. It's not as simple as being a good player and thinking you're going to get there every year. A lot of things have to come into play."
There is another connection to the Stanley Cup Final for Pronger -- Predators coach Peter Laviolette. He played for Laviolette with the Philadelphia Flyers when they lost to the Chicago Blackhawks in the 2010 Final. Pronger was also on the losing side against Laviolette when the Carolina Hurricanes defeated the Oilers in the 2006 Final.
His success through the years speaks to his coaching ability and his systems, Pronger said.
"He likes to play an up-tempo game, cycle the puck and control the puck and force teams to play defense," Pronger said. "He plays to the strengths of his team. They are a fast team.
"Everybody talks about how fast Pittsburgh is. You could argue that Nashville is faster. You look at the makeup of that team, and they've got some studs in the back end. (Mattias) Ekholm is having a great year. (Roman) Josi, (Ryan) Ellis. One might argue (P.K.) Subban is the fourth-best defenseman on the team. That's how well that group is playing."