| Boys Baseball Class A Bracket | 1998-99 |
| Rochester Sectional | ||||||
| Regionals | Sectionals | State Qualifier | ||||
| (1) Pleasant Plains | (1) Pleasant Plains 10-0 (6 inn) |
(1) Pleasant Plains 5-4 |
Pleasant Plains 12-4 |
Pleasant Plains 9-1 |
Pleasant Plains 11-7 |
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| (8) Springfield (Calvary) | (8) Springfield (Calvary) 8-4 |
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| (9) Springfield (Lutheran) | ||||||
| (4) New Berlin (Coop) | (5) Riverton 7-3 |
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| (5) Riverton | (5) Riverton 12-0 (5 Inn) |
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| (12) Athens | ||||||
| (2) Rochester | (2) Rochester 4-1 |
(3) Williamsville 8-3 |
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| (7) Ashland (A-C Central) | (7) Ashland (A-C Central) 12-1 (5 Inn) |
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| (10) Buffalo (Tri-City) | ||||||
| (3) Williamsville | (3) Williamsville 7-0 |
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| (6) Springfield (Ursuline) | (6) Springfield (Ursuline) 4-3 (8 inn.) |
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| (11) Mt. Pulaski | ||||||
| (1) Gillespie | (1) Gillespie 8-5 |
(1) Gillespie 11-2 |
Carlinville 13-3 (6 inn) |
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| (8) Mt. Olive | (9) Girard 8-2 |
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| (9) Girard | ||||||
| (4) Hillsboro | (4) Hillsboro 7-6 (8 inn.) |
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| (5) Litchfield | (5) Litchfield 19-2 |
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| (12) Palmyra (Northwestern) (Coop) | ||||||
| (2) Staunton | (2) Staunton 15-5 (5 inn) |
(3) Carlinville 10-9 |
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| (7) Auburn | (7) Auburn 5-3 |
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| (10) Virden | ||||||
| (3) Carlinville | (3) Carlinville 18-5 |
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| (6) Livingston | (11) Bunker Hill 12-7 (8 Innings) |
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| (11) Bunker Hill | ||||||
| (1) Piasa (Southwestern) | (1) Piasa (Southwestern) 21-0 |
(1) Piasa (Southwestern) 19-7 |
Piasa (Southwestern) 19-10 |
Morrisonville (Coop) 11-7 |
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| (8) Winchester | ||||||
| (4) Brussels | (4) Brussels 8-6 |
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| (5) Carrollton | ||||||
| (2) Jacksonville (Routt) | (2) Jacksonville (Routt) 17-2 |
(2) Jacksonville (Routt) 11-2 |
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| (7) Greenfield | ||||||
| (3) Hardin (Calhoun) | (6) White Hall (North Greene) 2-0 |
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| (6) White Hall (North Greene) | ||||||
| (1) Raymond (Lincolnwood) | (1) Raymond (Lincolnwood) 7-5 |
(4) Warrensburg (W.-Latham) 7-4 |
Morrisonville (Coop) 4-2 |
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| (8) Macon (Meridian) | (8) Macon (Meridian) 11-0 (5 inn.) |
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| (9) Ramsey | ||||||
| (4) Warrensburg (W.-Latham) | (4) Warrensburg (W.-Latham) 5-3 |
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| (5) Pana (Coop) | (5) Pana (Coop) 7-5 |
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| (12) Edinburg | ||||||
| (2) Niantic (N.-Harristown) (Coop) | (2) Niantic (N.-Harristown) (Coop) 11-1 |
(3) Morrisonville (Coop) 7-3 |
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| (7) Nokomis | (7) Nokomis 11-3 |
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| (10) Pawnee | ||||||
| (3) Morrisonville (Coop) | (3) Morrisonville (Coop) 12-2 |
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| (6) Moweaqua (Central A & M) | (6) Moweaqua (Central A & M) 6-1 |
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| (11) Divernon | ||||||