| Boys Baseball Class AA Bracket | 1997-98 | 
| Galesburg Sectional | ||||||
| Regionals | Sectionals | State Qualifier | ||||
| (1) Peoria (Notre Dame) | (1) Peoria (Notre Dame) NA-NA  | 
(1) Peoria (Notre Dame) 7-2  | 
Peoria (Notre Dame) 8-2  | 
Peoria (Notre Dame) 6-4  | 
Ottawa (Twp.) 9-8  | 
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| (8) Peoria (H.S.) | (9) Peoria (Manual) 6-4  | 
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| (9) Peoria (Manual) | ||||||
| (4) Bartonville (Limestone) | (4) Bartonville (Limestone) NA-NA  | 
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| (5) Peoria (Woodruff) | ||||||
| (2) Peoria (Richwoods) | (7) Metamora 8-5 (9 inn.)  | 
(7) Metamora 8-7  | 
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| (7) Metamora | ||||||
| (3) Canton | (6) Washington NA-NA  | 
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| (6) Washington | ||||||
| (1) Freeport (H.S.) | (1) Freeport (H.S.) 8-4  | 
(4) Belvidere 8-4  | 
Rockford (Guilford) 13-3 (6 inn.)  | 
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| (8) Rockford (East) | (8) Rockford (East) 8-1  | 
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| (9) Rockford (Auburn) | ||||||
| (4) Belvidere | (4) Belvidere 8-7 (8 inn.)  | 
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| (5) Rockford (Boylan) | ||||||
| (2) Machesney Park (Harlem) | (7) Rockford (Jefferson) 14-7  | 
(3) Rockford (Guilford) 14-0  | 
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| (7) Rockford (Jefferson) | ||||||
| (3) Rockford (Guilford) | (3) Rockford (Guilford) 9-3  | 
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| (6) Rockton (Hononegah) | ||||||
| (1) Rock Island (H.S.) | (1) Rock Island (H.S.) 16-6  | 
Moline 12-6  | 
Ottawa (Twp.) 8-3  | 
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| (4) Geneseo (Darnall) | (4) Geneseo (Darnall) NA-NA  | 
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| (5) East Moline (United) | ||||||
| (2) Moline | (2) Moline NA-NA  | 
(2) Moline 4-3  | 
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| (7) Sterling (H.S.) | ||||||
| (3) Galesburg | (3) Galesburg 4-2  | 
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| (6) Princeton | ||||||
| (1) Ottawa (Twp.) | (1) Ottawa (Twp.) 6-2  | 
Ottawa (Twp.) 10-4  | 
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| (4) Rochelle | (4) Rochelle 10-3  | 
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| (5) Streator (Twp.) | ||||||
| (2) LaSalle (L.-Peru) | (2) LaSalle (L.-Peru) NA-NA  | 
(3) Sycamore 9-3  | 
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| (7) DeKalb | ||||||
| (3) Sycamore | (3) Sycamore 8-1  | 
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| (6) Dixon | ||||||