There has been only two instances of a batting order in birthdate order, and both of them started with the youngest player and move to the oldest:
July 10, 1993 Padres at Expos
| EXPOS | Birthdate |
| Delino DeShields | 1/15/1969 |
| Mike Lansing | 4/3/1968 |
| Marquis Grissom | 4/17/1967 |
| Larry Walker | 12/1/1966 |
| Darrin Fletcher | 10/3/1966 |
| Moises Alou | 7/3/1966 |
| Frank Bolick | 6/28/1966 |
| Sean Berry | 3/22/1966 |
| Jeff Fassero | 1/5/1963 |
July 13, 1935 Boston Braves at Cubs
| BRAVES | Birthdate |
| Joe Coscarart | 11/18/1909 |
| Buck Jordan | 1/16/1907 |
| Randy Moore | 6/21/1906 |
| Wally Berger | 10/10/1905 |
| Hal Lee | 2/15/1905 |
| Pinky Whitney | 1/2/1905 |
| Billy Urbanski | 6/5/1903 |
| Al Spohrer | 12/3/1902 |
| Bob Smith | 4/22/1895 |