The crash happened around noon on Tuesday. The Pasco County sheriff's office marine unit responded to the downed plane and found Halladay's body. No survivors were found.
Sheriff's officials couldn't confirm if there were additional passengers on the plane or say where it was headed or why it crashed.
The Philadelphia Phillies released the following statement upon word of Halladay's death:
Halladay, who played for the Toronto Blue Jays and the Philadelphia Philies, tweeted frequently about his love for flying.
What do clouds feel like? I didn’t know either until I got my new Icon A5! I’m getting bruises on my arms from constantly pinching myself! pic.twitter.com/BaObEUj3Xo— Roy Halladay (@RoyHalladay) October 13, 2017
Can’t begin to explain all the breathtaking views I have seen thru the open windows of demo’s & now my very own Icon A5! Thx to all at Icon! pic.twitter.com/BZsXqcHFmt— Roy Halladay (@RoyHalladay) October 13, 2017
Harry Leroy Halladay III, affectionately known as "Doc," was one of just six pitchers to win the Cy Young Award in both leagues.
Halladay pitched a perfect game on May 29, 2010, beating the Florida Marlins 1-0. In his first-ever postseason start later that season, Halladay threw the second no-hitter in MLB postseason history against the Cincinnati Reds in Game 1 of the NLDS.
Halladay retired in 2013 after 12 seasons with the Blue Jays followed by four seasons with the Phillies.
The Associated Press contributed to this report.