Tracy fell ill while experiencing a mild arrhythmia, which is an irregular heartbeat, the Rockies said, and was returning to his Florida home with his wife, Debra.
Tracy was with Rockies coaches Tom Runnells and Carney Lansford near a set of elevators in the Dolphin Hotel, part of the Walt Disney World Swan & Dolphin Resort where the Major League Baseball Winter Meetings are being conducted, when he collapsed.
The coaches stayed with him until emergency personnel arrived. Tracy was conscious and responsive when he was being attended to, and stood with assistance. After several minutes of being examined, he was taken from the hotel on a stretcher.
Several coaches and club officials went to the hospital with Tracy, and his family was quickly notified. Tracy and his wife have a home in Lakewood Ranch in Bradenton, Fla., roughly two hours away. They had been spending time there before the Winter Meetings.
Tracy, who will turn 55 on New Year's Eve, was with his coaches after a full day of business. He had chatted with a reporter about his travel plans for the next few weeks about two hours before he collapsed.
Tracy has a record of 157-121 since becoming the Rockies' manager in May 2009. He won the National League Manager of the Year Award in 2009 after leading the Rockies to the playoffs. He is under a three-year contract through 2012.
Thomas Harding is a reporter for MLB.com. Read his blog, Hardball in the Rockies, and follow him on Twitter @harding_at_mlb. This story was not subject to the approval of Major League Baseball or its clubs.