Blue Jays activate Cy Young winner
Halladay, who missed two starts with a sore shoulder, was the starter for Saturday's game against Arizona.
The right-hander entered the game 5-4 with a 3.58 ERA. He was durable last year, going 22-7 with a 3.25 ERA and leading the majors with 266 innings.
The Blue Jays also placed right-hander Kerry Ligtenberg on the 15-day disabled list with inflammation in his left hip.
Copyright 2004 by The Associated Press
MORE MLB HEADLINES
- Source: Tigers' Iglesias to sit out until break
- D-backs' Corbin exits start with tight forearm
- Orioles 3B Machado (knee) suffers setback
- Rivera honored, but Yanks no-hit in Panama
MOST SENT STORIES ON ESPN.COM
- FANMATS Toronto Blue Jays Heavy Duty Vinyl Car Mats 2-Pack