| Boys Baseball Class AA Bracket | 1997-98 | 
| Barrington Sectional | ||||||
| Regionals | Sectionals | State Qualifier | ||||
| (1) Barrington | (1) Barrington 12-5  | 
(1) Barrington 6-2  | 
Barrington 11-1 (5 inn.)  | 
Barrington 5-3  | 
Barrington 6-0  | 
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| (8) Elk Grove Village (E.G.) | ||||||
| (4) Rolling Meadows | (5) Palatine (Fremd) 4-1  | 
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| (5) Palatine (Fremd) | ||||||
| (2) Lake Zurich | (2) Lake Zurich 4-3  | 
(6) Arlington Heights (Hersey) 5-1  | 
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| (7) Palatine (H.S.) | ||||||
| (3) Mt. Prospect (Prospect) | (6) Arlington Heights (Hersey) 12-2  | 
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| (6) Arlington Heights (Hersey) | ||||||
| (1) Antioch | (1) Antioch 16-1 (5 inn.)  | 
(1) Antioch 9-3  | 
Gurnee (Warren) 3-2  | 
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| (8) North Chicago | ||||||
| (4) Waukegan | (4) Waukegan 14-5  | 
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| (5) Grayslake | ||||||
| (2) Gurnee (Warren) | (2) Gurnee (Warren) 1-0  | 
(2) Gurnee (Warren) 1-0 (8 inn.)  | 
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| (7) Fox Lake (Grant) | ||||||
| (3) Zion (Z.-Benton) | (3) Zion (Z.-Benton) 10-6  | 
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| (6) Round Lake | ||||||
| (1) Schaumburg | (1) Schaumburg 10-0 (6 inn.)  | 
(1) Schaumburg 13-2  | 
Schaumburg 11-0 (5 inn.)  | 
Schaumburg 1-0  | 
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| (8) Streamwood | (8) Streamwood 6-3  | 
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| (9) Algonquin (Jacobs) | ||||||
| (4) Roselle (Lake Park) | (4) Roselle (Lake Park) 10-5  | 
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| (5) Hoffman Estates (H.S.) | ||||||
| (2) Elgin (Larkin) | (2) Elgin (Larkin) 11-6  | 
(2) Elgin (Larkin) 4-1  | 
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| (7) Hoffman Estates (Conant) | ||||||
| (3) Elgin (H.S.) | (3) Elgin (H.S.) 5-2  | 
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| (6) Carpentersville (Dundee-Crown) | ||||||
| (1) McHenry | (1) McHenry 5-1  | 
(5) Crystal Lake (Prairie Ridge) 3-2  | 
Mundelein (Carmel) 4-3  | 
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| (8) Crystal Lake (South) | (8) Crystal Lake (South) 5-4  | 
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| (9) Crystal Lake (Central) | ||||||
| (4) Cary (C.-Grove) | (5) Crystal Lake (Prairie Ridge) 8-6  | 
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| (5) Crystal Lake (Prairie Ridge) | ||||||
| (2) Mundelein (Carmel) | (2) Mundelein (Carmel) 13-3  | 
(2) Mundelein (Carmel) 3-0  | 
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| (7) Wauconda | ||||||
| (3) Mundelein (H.S.) | (3) Mundelein (H.S.) 6-5  | 
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| (6) Woodstock (H.S.) | ||||||