"It's exciting when he comes in. It just lights up the stadium," Sabathia said Wednesday at the Yankees' holiday food drive.
After helping the Cubs win their first World Series title since 1908, Chapman became a free agent and agreed last week to a five-year, $86 million contract with the Yankees, a deal that has not yet been finalized.
"I think with the guys that we have now, you have that same kind of relief where you can go out and pitch a good game and feel like the game's shut down once you get to those guys," Sabathia said.
Prior to arriving at Yankee Stadium, Sabathia took an overnight flight from Portland, Oregon, after attending an NBA game with Derek Jeter. Sabathia has been at Yankee Stadium several times each week following arthroscopic surgery Oct. 11 on his right knee.
"I'm trying to get my mobility back and make sure that I'm ready to go come spring training," he said.
Sabathia is a 35-year-old left-hander, and he pitched with a brace on his right knee this year while going 9-12 with a 3.91 ERA, his lowest since 2012. He will make $25 million next year, the final season of his contract.
"We'll see how it shakes out and who ends up in the bullpen. But it's exciting to have this kind of talent," Sabathia said.
Severino was 5-3 with a 2.89 ERA in 11 starts over the final two months in 2015. The 22-year-old right-hander went 3-8 with a 5.83 ERA this year in 11 starts and 10 relief appearances, making only four big league starts after mid-May.
"I felt like we kind of put some expectations on him, some heavy ones, and things just kind of snowballed on him," Sabathia said. "Obviously, him going back down and coming back up and pitching well out of the bullpen helped him confidence-wise."
"It is a team in transition," Sabathia said. "Watching all the young kids come up and do what they did last year was fun, and hopefully they can keep it going and carry us hopefully to the playoffs this year."