Roy Halladay became the sixth-oldest pitcher to throw a perfect game.

Here are the ages of pitchers when they threw perfect games, from oldest to youngest:

Randy Johnson (2004) — 40 years, 8 months, 8 days.

Cy Young (1904) — 37 years, 1 month, 7 days

David Cone (1999) — 36 years, 6 months, 16 days

Dennis Martinez (1991) — 36 years, 2 months, 14 days

David Wells (1998) — 34 years, 11 months, 27 days

Roy Halladay (2010) — 33 years, 0 months, 15 days

Jim Bunning (1964) — 32 years, 7 months, 29 days

Kenny Rogers (1994) — 29 years, 8 months, 18 days

Sandy Koufax (1965) — 29 years, 8 months, 10 days

Mark Buehrle (2009) — 29 years, 4 months

Addie Joss (1908) — 28 years, 5 months, 20 days

Tom Browning (1988) — 28 years, 4 months, 19 days

x-Don Larsen (1956) — 27 years, 2 months, 1 day

Dallas Braden (2010) — 26 years, 9 months, 26 days

Charles Robertson (1922) — 26 years, 3 months

Len Barker (1981) — 25 years, 10 months, 8 days

Mike Witt (1984) — 24 years, 2 months, 10 days

y-John Richmond (1880) — 23 years, 1 month, 7 days

Catfish Hunter (1968) — 22 years, 1 month

y-John Montgomery Ward (1880) — 20 years, 3 months, 14 days