Roy Halladay retiring, sources say

— -- Two-time Cy Young Award winner Roy Halladay will announce his retirement Monday in a news conference with the Toronto Blue Jays, the free agent having signed a one-day contract with his former team, sources confirmed to ESPN The Magazine's Buster Olney.

The Blue Jays have announced a 12:30 p.m. ET news conference at the winter meetings in Lake Buena Vista, Fla., though the reason for the event was not specified.

Halladay missed much of the 2013 season after having surgery on his shoulder in May to repair a partially torn rotator cuff and remove a bone spur. He also had some fraying of the labrum.

Halladay's career has spanned 16 seasons, the last four of which he spent with the  Philadelphia Phillies. He has a 203-105 career record with a 3.38 ERA.

Halladay garnered the AL Cy Young in 2003 with Toronto after posting career highs with 22 wins and 266 innings pitched. He won the NL award in 2010, his first season with the Phillies, when he went 21-10 with a 2.44 ERA.

Information from The Associated Press was used in this report.