| Boys Baseball Class AA Bracket | 1998-99 |
| The Road to Geneva | ||||||
| Regional Finals | Sectionals | State Final Tournament | State Champion | |||
| (1) Collinsville | Belleville (Althoff) 9-4 |
Belleville (East) 10-8 |
Edwardsville (H.S.) 12-1 (5 inn.) |
Winnetka (New Trier) 11-1 |
Winnetka (New Trier) 15-14 |
St. Charles 12-3 |
| (2) Belleville (Althoff) | ||||||
| (1) Belleville (East) | Belleville (East) 6-0 |
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| (2) O'Fallon | ||||||
| (1) Edwardsville (H.S.) | Edwardsville (H.S.) 9-2 |
Edwardsville (H.S.) 10-6 |
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| (2) St. Jacob (Triad) | ||||||
| (1) Mt. Vernon | Mt. Vernon 11-0 (6 Innings) |
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| (2) Marion (H.S.) | ||||||
| (1) Buffalo Grove | Buffalo Grove 11-0 (5 Innings) |
Buffalo Grove 9-4 |
Winnetka (New Trier) 15-6 |
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| (2) Lincolnshire (Stevenson) | ||||||
| (1) LaGrange Park (Nazareth Academy) | LaGrange Park (Nazareth Academy) 9-2 |
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| (3) LaGrange (Lyons) | ||||||
| (1) Oak Park (O.P.-River Forest) | Oak Park (Fenwick) 8-7 |
Winnetka (New Trier) 7-4 |
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| (2) Oak Park (Fenwick) | ||||||
| (1) Winnetka (New Trier) | Winnetka (New Trier) 5-1 |
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| (3) Wilmette (Loyola Academy) | ||||||
| (1) Oak Forest | Orland Park (Sandburg) 14-0 (5 Innings) |
Orland Park (Sandburg) 8-4 |
Tinley Park (Andrew) 14-4 (5 inn.) |
Tinley Park (Andrew) 3-2 |
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| (2) Orland Park (Sandburg) | ||||||
| (1) Chicago (DeLaSalle Institute) | Chicago (DeLaSalle Institute) 12-1 |
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| (2) Chicago (Mt. Carmel) | ||||||
| (1) New Lenox (Providence) | Tinley Park (Andrew) 3-2 |
Tinley Park (Andrew) 8-7 |
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| (2) Tinley Park (Andrew) | ||||||
| (1) Flossmoor (Homewood-F.) | Flossmoor (Homewood-F.) 29-14 |
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| (2) Lansing (Thornton Fractional South) | ||||||
| (1) Hoffman Estates (Conant) | Schaumburg 4-3 |
Schaumburg 7-1 |
Mundelein (Carmel) 10-2 |
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| (3) Schaumburg | ||||||
| (4) Palatine (Fremd) | Palatine (Fremd) 4-2 |
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| (2) Mt. Prospect (Prospect) | ||||||
| (1) Mundelein (Carmel) | Mundelein (Carmel) 11-1 (6 Innings) |
Mundelein (Carmel) 5-4 (10 inn) |
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| (2) Mundelein (H.S.) | ||||||
| (1) Zion (Z.-Benton) | Zion (Z.-Benton) 15-4 (5 innings) |
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| (3) Waukegan | ||||||
| (4) Darien (Hinsdale South) | Darien (Hinsdale South) 8-5 |
Darien (Hinsdale South) 11-1 (6 inn) |
St. Charles 6-4 |
St. Charles 4-1 |
St. Charles 10-0 (5 inn.) |
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| (2) Hinsdale (Central) | ||||||
| (1) Joliet (Twp.) | Morris 7-1 (6 inn.) |
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| (2) Morris | ||||||
| (4) Wheaton (North) | Wheaton (North) 2-0 |
St. Charles 10-0 (5 inn) |
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| (2) Aurora (Waubonsie Valley) | ||||||
| (1) St. Charles | St. Charles 9-6 |
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| (2) Batavia | ||||||
| (1) Normal (Community West) | Normal (Community West) 5-4 |
Normal (Community West) 13-3 (6 inn.) |
Champaign (Centennial) 7-6 (9 inn.) |
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| (2) Morton | ||||||
| (1) Mattoon | Mattoon 11-10 |
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| (3) Charleston | ||||||
| (1) Champaign (Centennial) | Champaign (Centennial) 7-2 |
Champaign (Centennial) 11-1 (5 inn.) |
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| (2) Urbana (H.S.) | ||||||
| (5) Jacksonville (H.S.) | Quincy (Sr.) 4-2 |
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| (7) Quincy (Sr.) | ||||||
| (4) Streator (Twp.) | Ottawa (Twp.) 14-3 |
Ottawa (Twp.) 7-3 |
Rock Island (H.S.) 4-0 |
Rock Island (H.S.) 13-3 (5 inn.) |
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| (3) Ottawa (Twp.) | ||||||
| (1) Peoria (Notre Dame) | Peoria (Notre Dame) 12-4 |
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| (3) Peoria (Richwoods) | ||||||
| (1) Rock Island (H.S.) | Rock Island (H.S.) 5-0 |
Rock Island (H.S.) 1-0 |
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| (3) Geneseo (Darnall) | ||||||
| (5) Rockford (Guilford) | Rockford (Boylan) 4-2 |
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| (2) Rockford (Boylan) | ||||||
| Chicago (Lane) | Chicago (Lane) 7-5 |
Chicago (Simeon) 4-3 (8 inn.) |
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| Chicago (Harlan) | ||||||
| Chicago (Simeon) | Chicago (Simeon) 3-2 (8 inn.) |
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| Chicago (Schurz) | ||||||