Cashman's first jump at the Homestead Air Force Base outside Miami went perfectly -- so well that the GM agreed to go back into the sky for a second jump.
That one didn't go quite as well, and Cashman told reporters that he felt a pop in his ankle upon landing. He was taken to Homestead Hospital, where X-rays showed he suffered a broken right fibula and a dislocated right ankle. He was scheduled for surgery later Monday with Dr. Dominic Carreira at Broward Health Medical Center.
"I'm in great spirits, and it was an awesome experience," Cashman said. "The Golden Knights are first class. While I certainly didn't intend to raise awareness in exactly this fashion, I'm extremely happy that the Wounded Warrior Project is getting the well-deserved additional attention."
Cashman made the tandem jumps with military personnel from heights of 12,500 feet.
"It was exhilarating," Cashman said after the first jump, in which he fell at an average speed of 129 mph. "I was nervous when he walked me to the edge and the wind was blowing."
The Golden Knights invited Cashman to participate in a jump when they parachuted into Yankee Stadium last summer, and again as the Yankees finalized plans for a March 30 exhibition game to be played at West Point.
"It's an opportunity to do something that a lot of people don't do or will ever do, so that's awesome," Cashman said last week. "It's called living. But it's not on my list of something I've always wanted to do. I'm kind of excited for the opportunity to do it, but at the same time, big-time nervous about doing it."
The purpose of the Wounded Warrior Project is to raise awareness and enlist the public's aid for the needs of injured service members, to help injured servicemen and women aid and assist each other, and to provide unique, direct programs and services to meet their needs.
Cashman has participated in several unusual events for charity in recent years. In each of the last three years, he has rappelled down the side of the 22-story Landmark Building in Stamford, Conn., as part of the city's Heights and Lights holiday festival.
He also slept outdoors in a Manhattan parking lot in November 2011 to raise awareness for Covenant House International, a nonprofit charity serving homeless youths across America.
"I know I was asked when I was going off the buildings, 'How difficult is something like this?'" Cashman said last week. "I would say it's harder, probably, to be GM of the Yankees than jump out of an airplane."