Roy Halladay, a retired pitcher who starred for the Toronto Blue Jays and the Philadelphia Phillies, died on Tuesday when his plane crashed in the Gulf of Mexico off the coast of Florida. He was 40.

The crash was reported to the Pasco County Sheriff’s Office by a resident at 12:06 p.m., and when law enforcement arrived on the scene, the plane, an ICON A5 registered to Halladay, was upside down in shallow water.

After four hours of search and recovery, Sheriff Chris Nocco reported that Halladay had been the only person on the plane and said the specifics of the crash were still under investigation.

Nocco referred most questions involving the crash to the National Transportation Safety Board, which will take over the investigation, but he said there had been no mayday call received by air traffic control in nearby Tampa before the crash.