Halladay was traded to the Philadelphia Phillies on Dec. 16 after 12 seasons with Toronto. The ad in Tuesday's Toronto Sun said that he felt "blessed" to have been part of the organization since being drafted in 1995.
Said the right-hander: "Toronto will forever have a special place in my heart. The memories will last a lifetime and so will my gratitude."
The 2003 Cy Young Award winner was 148-76 with a 3.43 ERA for the Blue Jays. He was traded to the Phillies in a four-team blockbuster deal that included Cliff Lee.