Harry Leroy "Roy" Halladay III (born May 14, 1977), nicknamed "Doc", is a Major League Baseball starting pitcher for the Philadelphia Phillies. His nickname, coined by the late Toronto Blue Jays announcer Tom Cheek, is a reference to Wild West gunslinger "Doc" Holliday.He was the Blue Jays' first draft selection in the 1995 Major League Baseball Draft, the 17th pick overall, and played for the team from 1998 through 2009, after which he was traded to Philadelphia. Halladay is known for his ability to effectively pitch deep into games, and is currently the active major league leader in complete games with 63, including 19 shutouts.
On May 29, 2010, Halladay pitched the 20th perfect game in MLB history, beating the Florida Marlins by a score of 1–0.On October 6, 2010, in his first post-season start, Halladay threw the second no-hitter in MLB postseason history (Don Larsen's perfect game in the 1956 World Series being the first) against the Cincinnati Reds in Game 1 of the 2010 NLDS. It was his second no-hitter of the year (following the May 29 perfect game), making Halladay the fifth pitcher in major league history (and the first since Nolan Ryan in 1973) to throw multiple no-hitters in the same season. Halladay has won 2 Cy Young Awards, in 2003 and 2010.Halladay's fastball was clocked up to 95 miles per hour (153 km/h), but it had little movement, and his pitches were up in the strike zone, which was ultimately the reason why his 2000 season was so unsuccessful. He worked with former Blue Jays pitching coach Mel Queen. The problem, Queen realized, was Halladay’s total reliance on his strength—his attempt to overpower batters with straight-ahead pitches. Within two weeks, Halladay had altered his arm angle for a more deceptive delivery, and added pitches that sank and careened. Instead of throwing over the top, he chose to use a three-quarters delivery (the middle point between throwing overhand and sidearm). Originally a fastball pitcher, he became reliant on keeping his pitches low across the plate, regardless of the type of pitch thrown. The adjustments proved successful. After a month and a half, he was promoted to class AA Tennessee, and a month later, to class AAA Syracuse. By mid-season, he was back in the Blue Jays’ rotation. He posted a 5–3 win–loss record with a 3.19 ERA for the Blue Jays in 16 starts in 2001.
Halladay continued his success in the 2003 season, posting a 22–7 record with a 3.25 ERA in 266.0 innings. He also recorded 204 strikeouts and only 32 walks, good for a remarkable 6.38 strikeouts per walk ratio. Halladay pitched the first extra-inning shutout in the major leagues since Jack Morris in Game 7 of the 1991 World Series, leading the Blue Jays to victory over the Tigers on September 6. He pitched 10 innings and had not allowed a hit until Kevin Witt doubled with two outs in the top of the eighth. Halladay won the American League Cy Young Award, while being once again named an All-Star and leading the Blue Jays to a surprising 86 victories.