| Boys Baseball Class A Bracket | 1998-99 |
| Marissa Sectional | ||||||
| Regionals | Sectionals | State Qualifier | ||||
| (1) Alton (Marquette) | (1) Alton (Marquette) 9-1 |
(1) Alton (Marquette) 6-4 |
Alton (Marquette) 13-0 (5 inn) |
Chester 5-2 |
Nashville 4-1 |
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| (8) Wood River (East Alton-W.R.) | (8) Wood River (East Alton-W.R.) 14-4 (5 inn.) |
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| (9) Edwardsville (Metro-East Lutheran) | ||||||
| (4) Breese (Mater Dei) | (4) Breese (Mater Dei) 8-3 |
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| (5) Breese (Central) | ||||||
| (2) Roxana | (2) Roxana 14-7 |
(2) Roxana 5-2 |
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| (7) Trenton (Wesclin) | (7) Trenton (Wesclin) 7-0 (forfeit) |
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| (10) Lovejoy | ||||||
| (3) Dupo | (6) Lebanon 6-5 |
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| (6) Lebanon | ||||||
| (1) Chester | (1) Chester 9-5 |
(1) Chester 19-8 6inn |
Chester 11-1 |
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| (8) Zeigler (Z.-Royalton) (Coop) | (8) Zeigler (Z.-Royalton) (Coop) 9-7 |
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| (9) Elkville (Elverado) | ||||||
| (4) Steeleville | (5) Waltonville (Coop) 9-4 |
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| (5) Waltonville (Coop) | ||||||
| (2) DuQuoin | (2) DuQuoin 13-0 |
(3) Campbell Hill (Trico) 16-7 |
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| (7) Pinckneyville | ||||||
| (3) Campbell Hill (Trico) | (3) Campbell Hill (Trico) 7-0 |
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| (6) Woodlawn | ||||||
| (1) Columbia | (1) Columbia 13-1 (5 inn) |
(1) Columbia 9-1 |
Columbia 7-5 |
Nashville 11-0 (5 inns) |
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| (8) Valmeyer | (9) Sparta 9-5 |
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| (9) Sparta | ||||||
| (4) Marissa | (5) Freeburg 13-3 |
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| (5) Freeburg | ||||||
| (2) Waterloo (Gibault) | (7) New Athens 8-3 |
(7) New Athens 7-5 |
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| (7) New Athens | (7) New Athens 10-0 |
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| (10) Coulterville | ||||||
| (3) Red Bud | (6) Okawville 8-7 (8 Innings) |
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| (6) Okawville | ||||||
| (1) Nashville | (1) Nashville 5-1 (5 Inn) |
(1) Nashville 14-0 |
Nashville 13-8 |
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| (8) Odin | (9) Mulberry Grove 8-4 (10 Innings) |
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| (9) Mulberry Grove | ||||||
| (4) Carlyle | (5) Brownstown 14-8 |
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| (5) Brownstown | ||||||
| (2) Farina (South Central) | (2) Farina (South Central) 19-2 (5 Inn) |
(2) Farina (South Central) 9-4 |
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| (7) Patoka | (7) Patoka 17-6 |
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| (10) Sandoval | ||||||
| (3) Greenville | (3) Greenville 10-5 |
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| (6) Vandalia | ||||||