The Hall of Famer was taken to Memorial Regional Hospital in Hollywood, Fla., Friday night after falling from an elevated stage where he was seated during a baseball banquet, The Baltimore Sun reported.
Witnesses said Robinson leaned backwards in his chair and dropped about six feet to the floor.
Efforts to reach a spokesman for the baseball great were unsuccessful but a nurse at the hospital the Sun he was "resting comfortably, and sleeping."
He fractured his shoulder in two places, paramedics said.
Notable deaths of 2014 [PHOTOS]