| Boys Baseball Class A Bracket | 1998-99 |
| Addison (Driscoll) Sectional | ||||||
| Regionals | Sectionals | State Qualifier | ||||
| (1) Norridge (Ridgewood) | (1) Norridge (Ridgewood) 2-1 |
(4) Addison (Driscoll) 9-4 |
Addison (Driscoll) 6-5 (8 inn) |
Addison (Driscoll) 15-1 (5 inns) |
Addison (Driscoll) 7-4 |
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| (8) Chicago (Luther North) | (9) Elgin (St. Edward) 10-4 |
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| (9) Elgin (St. Edward) | ||||||
| (4) Addison (Driscoll) | (4) Addison (Driscoll) 28-1 (5 inn.) |
(4) Addison (Driscoll) 5-2 |
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| (13) Winnetka (North Shore Country Day) | ||||||
| (5) Chicago (St. Benedict) | (5) Chicago (St. Benedict) 3-1 |
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| (12) Elgin (E. Academy) | ||||||
| (2) Melrose Park (Walther Lutheran) | (2) Melrose Park (Walther Lutheran) 21-4 (5 inn) |
(7) Elmhurst (Timothy Christian) 4-3 |
(7) Elmhurst (Timothy Christian) 9-8 |
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| (15) Chicago (St. Gregory) | ||||||
| (7) Elmhurst (Timothy Christian) | (7) Elmhurst (Timothy Christian) 9-1 |
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| (10) Niles (Northridge Prep) | ||||||
| (3) Lombard (Montini) | (3) Lombard (Montini) 10-0 (5 inn.) |
(3) Lombard (Montini) 2-1 |
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| (14) Elgin (Westminster Christian) | ||||||
| (6) Elmhurst (Immaculate Conception) | (6) Elmhurst (Immaculate Conception) 11-0 (5 inn) |
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| (11) Chicago (Weber) | ||||||
| (1) Byron | (1) Byron 7-2 |
(1) Byron 14-4 5inn |
Byron 12-6 |
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| (8) Marengo | (8) Marengo 6-5 |
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| (9) Harvard | ||||||
| (4) Rockford (Lutheran) | (4) Rockford (Lutheran) 5-4 (11 inn.) |
(5) Richmond (R.-Burton) 12-3 |
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| (13) Stillman Valley | ||||||
| (5) Richmond (R.-Burton) | (5) Richmond (R.-Burton) 6-5 |
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| (12) Rockford (Christian Life) | ||||||
| (2) Hampshire | (2) Hampshire 7-0 (forfeit) |
(2) Hampshire 9-0 |
(6) Woodstock (Marian) 16-13 |
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| (15) Rockford (R. Christian) | ||||||
| (7) South Beloit | (7) South Beloit 6-3 |
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| (10) Huntley | ||||||
| (3) Genoa (G.-Kingston) | (3) Genoa (G.-Kingston) 12-3 |
(6) Woodstock (Marian) 4-1 |
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| (14) Kirkland (Hiawatha) | ||||||
| (6) Woodstock (Marian) | (6) Woodstock (Marian) 10-0 (5 inn.) |
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| (11) Poplar Grove (North Boone) | ||||||
| (1) Palos Heights (Chicago Christian) | (1) Palos Heights (Chicago Christian) 10-1 |
(1) Palos Heights (Chicago Christian) 8-4 |
Palos Heights (Chicago Christian) 5-3 |
Palos Heights (Chicago Christian) 12-6 |
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| (8) Chicago (Hales Franciscan) | (8) Chicago (Hales Franciscan) 9-3 |
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| (9) Chicago (Quigley Prep) | ||||||
| (4) Chicago (University) | (4) Chicago (University) 10-0 (6 inn.) |
(5) Chicago (St. Francis de Sales) 6-3 |
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| (13) Chicago (Providence-St. Mel) | ||||||
| (5) Chicago (St. Francis de Sales) | (5) Chicago (St. Francis de Sales) 13-0 |
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| (12) Chicago (Luther South) | ||||||
| (2) Lansing (Illiana Christian) | (2) Lansing (Illiana Christian) 9-1 |
(2) Lansing (Illiana Christian) 7-6 |
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| (7) Chicago (Morgan Park Academy) | (10) Chicago (F.W. Parker) 8-6 |
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| (10) Chicago (F.W. Parker) | ||||||
| (3) Evergreen Park | (3) Evergreen Park 13-0 (5 inn) |
(3) Evergreen Park 3-1 |
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| (14) Chicago (Holy Trinity) | ||||||
| (6) Westmont | (6) Westmont 10-1 |
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| (11) Chicago (The Latin School) | ||||||
| (1) Wheaton (St. Francis) | (1) Wheaton (St. Francis) 15-0 (5 inn) |
(1) Wheaton (St. Francis) 2-1 |
Yorkville 5-4 |
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| (8) Lisle (Sr.) | (9) Newark 3-2 |
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| (9) Newark | ||||||
| (4) Burlington (Central) | (4) Burlington (Central) 10-5 |
(4) Burlington (Central) 2-0 |
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| (13) West Chicago (Wheaton Academy) | ||||||
| (5) Sandwich | (5) Sandwich 9-4 |
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| (12) Maple Park (Kaneland) | ||||||
| (2) Aurora (Central Catholic) | (2) Aurora (Central Catholic) 1-0 |
(2) Aurora (Central Catholic) 4-3 |
(6) Yorkville 9-3 |
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| (15) Hinckley (H.-Big Rock) | ||||||
| (7) Plano | (7) Plano 5-1 |
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| (10) Somonauk | ||||||
| (3) Aurora (A. Christian) | (3) Aurora (A. Christian) 12-1 (5 inn.) |
(6) Yorkville 5-3 |
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| (14) Shabbona (Indian Creek) | ||||||
| (6) Yorkville | (6) Yorkville 10-2 |
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| (11) Malta | ||||||