New York Yankees manager Aaron Boone said he is feeling "great" and hopes to re-join the team over the weekend following surgery.
Boone had an operation to receive a pacemaker at St. Joseph's Hospital in Tampa, Florida on Wednesday.
The 47-year-old underwent open-heart surgery in 2009.
"I feel great. I can't believe how good I feel," Boone said on Friday.
"It makes me really glad that I got this done because, certainly in the last couple of months, I have not felt anywhere close to how I felt this morning. Really excited about it; excited to get back."
On a return, Boone added: "I can say a couple days in now, me and my new buddy are doing quite well."
"If not tomorrow [Saturday], I'm hoping for Sunday," he continued.
Boone has been Yankees manager since 2018, leading the storied franchise to the American League Championship Series (ALCS) in 2019, while they lost in the AL Division Series (ALDS) last year.
The former third baseman was an All-Star with the Yankees in 2003.
"Now that I've got [the pacemaker] it's made me realise that I wasn't feeling good, just energy level, just not myself. I felt like I had to reach for it every day in a way," Boone said.
"And yesterday [Thursday] and even more so today, I just feel kind of ready to go and ready to kind of tackle things. [My cardiologist] said, 'this will be a pretty straightforward simple procedure, nothing like you've been through in the past. And it'll work right away, you'll notice it.' And he was right. I feel great."
Yankees general manager Brian Cashman said: "I don't know the exact time of his procedure [Wednesday] afternoon, but in the 7:10pm range, I get a FaceTime. And it's Aaron Boone. I pick up and the energy, how good he looked, the personality was so vibrant. And I'm like, 'Wow.'
"For him to have to go under, have this procedure, and within an hour or so he's back up and running as if nothing really happened at all, it was incredible. I know he's chomping at the bit to get back into that dugout, back into the Yankee uniform. But the greatest thing is that he just feels amazing. The newer version of him, I'm happy for him and happy for his family and happy for us."
The star-studded Yankees will open their 2021 season against American League (AL) East rivals the Toronto Blue Jays on April 1.