Clifton followed a similar path to Boston's postseason lineup. The New Jersey native played four seasons at Quinnipiac University, helping lead the Bobcats to the National Championship game - a 5-1 loss to North Dakota - during his junior season in 2015-16. He was also captain as a senior.
Unlike Kuhlman, the blue liner was drafted, a fifth-round selection by the Arizona Coyotes in 2013. His choice to stay in school for four years left him a free agent, however, giving the Bruins the ability to sign Clifton to a two-year contract last May.
"Growing up it's crazy. You don't really expect to play," said Clifton, who also spent time with the U.S. National Development Team Program. "You're just as good as so many players, and then eventually you get a shot. I got my commitment to Quinnipiac, I guess, when I was a junior in high school, so 16 or 17. I was with the [Jersey] Hitmen [of the EJHL].
"It's a dream to play Division 1 college hockey, right? And then you get a commitment, and then you go in and develop. You obviously dream about playing in the NHL, but you don't know if it will ever happen, right? And then long story short, here we are."
And it appears that him and Kuhlman could be here to stay. Both players began their seasons in Providence, before injuries forced them to be recalled to the big club. Clifton debuted in November and returned in mid-March, with Kuhlman getting a stint in February before his latest call-up in late last month.
The duo has impressed in limited time with the Black & Gold. Kuhlman has displayed speed and tenacity while playing mostly with DeBrusk and Krejci, picking up three goals and two assists in 11 games after posting 12-18-30 totals in 58 games with Providence this season.
"He's performed well. He has a history of playing his best hockey at crucial times. He's got leadership qualities," Sweeney said of Kuhlman. "I don't think he changes the way he plays, regardless of the situation, and that's a benefit to him as well. I think he knows what his strengths are, and he tries to play to those, which again, coaches appreciate. When you have the ability to plug a player in, and he doesn't change regardless of the situation, I think that's a benefit for all parties.
"And I think that's what Karson's done. He's played in all different roles and up and down the lineup, but he's handled himself really well, and he's earned the opportunity to be here and be in the mix."