How old were they?

Donnie Sadler

2B · Born June 17, 1975

Age in each postseason series

1. 1998 ALDS (September 29, 1998), Red Sox vs Indians 1–3: 23 years, 104 days
2. 1999 ALDS (October 6, 1999), Red Sox vs Indians 3–2: 24 years, 111 days
3. 1999 ALCS (October 13, 1999), Red Sox vs Yankees 1–4: 24 years, 118 days

Age in each season

1. 1998 (Red Sox): 22 years, 288 days to 23 years, 106 days
2. 1999 (Red Sox): 23 years, 288 days to 24 years, 106 days
3. 2000 (Red Sox): 24 years, 289 days to 25 years, 106 days
4. 2001 (Royals, Reds): 25 years, 288 days to 26 years, 106 days
5. 2002 (Rangers, Royals): 26 years, 288 days to 27 years, 106 days
6. 2003 (Rangers): 27 years, 288 days to 28 years, 106 days
7. 2004 (Diamondbacks): 28 years, 289 days to 29 years, 106 days
8. 2007 (Diamondbacks): 31 years, 288 days to 32 years, 106 days