"I honestly have no idea, I've never done this before," Stanton said of when he will be back. "They say four to six weeks.
"It's all on me. It's not like anything has to heal specifically, other than the holes they put in there. It's not like they had to carve anything out."
The Marlins officially placed their All-Star right fielder on the disabled list on Friday, and they reinstated center fielder Emilio Bonifacio.
The 22-year-old Stanton paces the Marlins with 19 home runs and 50 RBIs. Selected as an All-Star for the first time, he felt discomfort in his knee after playing against the Brewers on July 2 at Miller Park. An MRI exam on July 3 revealed "loose bodies" in the knee.
They turned out to be two pieces of cartilage.
"It was a matter of the pieces making my range of motion terrible," Stanton said.
The slugger tried to manage it and participate in the All-Star Game and State Farm Home Run Derby. But after he experienced discomfort in his knee last Saturday in St. Louis, he was removed from the game in the third inning. The next morning, he had surgery, which was performed by team physician, Dr. Lee Kaplan, in Miami.
"This is the first day [without crutches]," he said. "I'm getting my balance and everything back. It feels pretty good."
Former Marlins outfielder Preston Wilson, now an analyst for Fox Sports Florida, can relate to what Stanton is going through. In 2004, Wilson had cartilage fragments removed from his knee.
"It went well for me," Wilson said. "There are different degrees. [Stanton] is a little bit younger. I don't know how much wear and tear he had from football. They went in and cleaned it out. His big thing is going to be maintaining the soreness when it comes back."
Wilson said he returned from his scope in six weeks, but noted his surgery was a little more severe.
"It's amazing now," Wilson said. "They've learned to tailor the rehab. They do a lot of study on the rehab and when you get in and out. The day when I had my surgery, I was riding a bike later that afternoon, just getting that range of motion."