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O'FALLON (3-1)
2007AA 230 233 3-1 (28-8) 2nd Rick Gibson
W 63 60 Decatur (Eisenhower)
W 48 45 Lockport (Twp.)
W 65 51 Lincolnshire (Stevenson)
L 54 77 Chicago (Simeon)
OAK FOREST (1-1)
1987AA 120 124 1-1 (28-3) DNP Denny Denman
W 62 60 Evanston (Twp.)
L 58 64 East St. Louis (Lincoln)
OAK LAWN (COMMUNITY) (3-1)
1971 256 229 3-1 (30-3) 2nd Len Scaduto
W 66 54 Winnetka (New Trier East)
W 71 58 Benton
W 69 65 Springfield (Lanphier)
L 50 52 Dolton (Thornridge)
OAK LAWN (RICHARDS) (0-1)
1998AA 63 64 0-1 (28-2) DNP Jack Fitzgerald
L 63 64 Joliet (Twp.)
OAK PARK (FENWICK) (1-2)
1997AA 33 40 0-1 (23-6) DNP John Quinn
L 33 40 Harvey (Thornton)
1998AA 139 132 1-1 (28-3) DNP John Quinn
W 75 56 Olympia Fields (Rich Central)
L 64 76 Des Plaines (Maine West)
OAK PARK (O.P.-RIVER FOREST) (7-5)
1908 127 90 2-1 3rd Wilbur Hawthorne
W 58 27 St. Charles (H.S.)
L 28 36 Rock Island (H.S.)
W 41 27 Hinsdale (Twp.)
1951 41 54 0-1 (13-11) DNP Dave Miller
L 41 54 Lincoln
1956 242 266 2-2 (18-9) 4th Harry Kinert
W 62 57 Chicago Heights (Bloom Twp.)
W 63 48 Peoria (H.S.)
L 61 88 Edwardsville (H.S.)
L 56 73 Chicago (Dunbar)
1976AA 258 228 3-1 (28-5) 3rd Tom Meyer
W 71 55 Elgin (H.S.)
W 56 53 Wilmette (Loyola Academy) (OT)
L 58 59 Chicago (Morgan Park)
W 73 61 Decatur (Eisenhower)
OBLONG (0-1)
1937 31 37 0-1 (29-3) DNP Paul Beck
L 31 37 Woodstock (H.S.)
ODELL (ST. PAUL) (0-1)
1951 62 76 0-1 (31-3) DNP F.J. Casey
L 62 76 Peoria (Woodruff)
OHIO (3-2)
1985A 62 75 0-1 (26-3) DNP Lloyd Johnson
L 62 75 Harvard
1986A 237 239 3-1 (29-3) 2nd Lloyd Johnson
W 74 64 Marengo
W 73 50 Decatur (St. Teresa)
W 45 43 West Frankfort (Frankfort)
L 45 82 Teutopolis
OKAWVILLE (7-7)
1970 109 120 1-1 (29-2) DNP Dave Luechtefeld
W 66 64 Mt. Vernon (H.S.)
L 43 56 Joliet (Central)
1980A 247 231 3-1 (29-6) 3rd Dave Luechtefeld
W 58 56 Benton
W 55 53 Mt. Pulaski
L 57 59 Chicago (Luther South)
W 77 63 Madison
1982A 68 69 0-1 (26-7) DNP Dave Luechtefeld
L 68 69 Benton
1983A 47 52 0-1 (27-6) DNP Dave Luechtefeld
L 47 52 McLeansboro
1987A 214 181 3-1 (29-7) 2nd Dave Luechtefeld
W 36 34 Carterville
W 75 56 Watseka
W 49 35 Beardstown
L 54 56 Venice
1993A 66 70 0-1 (24-10) DNP Dave Luechtefeld
L 66 70 Cairo
2000A 44 57 0-1 (27-8) DNP Dave Leuchtefeld
L 44 57 Teutopolis
OLNEY (EAST RICHLAND) (5-7)
As Olney (H.S.)
1920 114 112 2-2 (23-6) 4th Charles Van Cleve
W 43 24 Champaign (H.S.)
W 33 22 Galesburg (H.S.)
L 18 37 Canton
L 20 29 Marion (H.S.)
1930 71 69 2-1 (33-6) 3rd Charles Van Cleve
W 21 18 Carbondale
L 23 33 Bloomington (H.S.)
W 27 18 Beardstown
1942 71 69 1-1 (27-5) DNP Frank Newton
W 47 40 Quincy (Sr.)
L 24 29 Freeport (H.S.)
As Olney (East Richland)
1975AA 77 89 0-1 (23-6) DNP Ron Herrin
L 77 89 East St. Louis (Sr.)
1978AA 58 79 0-1 (21-7) DNP Ron Herrin
L 58 79 Collinsville
2004A 58 62 0-1 (17-14) DNP Rob Flanagan
L 58 62 Pana (H.S.)
OLYMPIA FIELDS (RICH CENTRAL) (3-4)
1974AA 69 83 0-1 (22-6) DNP Jerry Leggett
L 69 83 Chicago Heights (Bloom Twp.)
1980AA 52 54 0-1 (29-1) DNP Ron Brauer
L 52 54 Downers Grove (South)
1986AA 244 193 3-1 (31-2) 2nd Ron Brauer
W 77 47 Palatine (Fremd)
W 54 43 Carbondale
W 73 56 Romeoville (H.S.)
L 40 47 Chicago (King)
1998AA 56 75 0-1 (22-8) DNP Lee Boyko
L 56 75 Oak Park (Fenwick)
ONEIDA (ROWVA) (3-3)
As Oneida (ROVA)
1949 41 68 0-1 (27-5) DNP Pogue
L 41 68 Chicago (Tilden)
1976A 242 227 3-1 (28-3) 2nd Bob Meredith
W 58 52 Port Byron (Riverdale)
W 49 46 Bloomington (Central Catholic)
W 77 70 Lawrenceville
L 58 59 Mt. Pulaski
1983A 66 72 0-1 (25-4) DNP Bob Meredith
L 66 72 Freeport (Aquin)
ORANGEVILLE (1-1)
1991A 114 118 1-1 (25-5) DNP Brian Benning
W 70 64 Dunlap (OT)
L 44 54 Seneca
OREGON (0-1)
1979A 48 64 0-1 (26-4) DNP Dennis Kessel
L 48 64 Elmhurst (Timothy Christian)
ORION (0-2)
1989A 49 54 0-1 (22-6) DNP Scott Olson
L 49 54 Rock Island (Alleman)
1995A 50 57 0-1 (22-7) DNP Jay Bizarri
L 50 57 Rock Island (Alleman)
OSWEGO (H.S.) (1-1)
1974AA 113 110 1-1 (22-6) DNP Steve Goers
W 64 47 Crystal Lake (H.S.)
L 49 63 Breese (Mater Dei)
OTTAWA (MARQUETTE) (5-4)
1973A 35 37 0-1 (28-2) DNP Bob Strickland
L 35 37 Maple Park (Kaneland)
1974A 246 192 3-1 (29-4) 2nd Bob Strickland
W 78 39 South Beloit
W 50 47 Ridgway
W 65 52 Quincy (Catholic Boys)
L 53 54 Lawrenceville
1978A 125 131 1-1 (20-11) DNP Bob Strickland
W 69 68 Chicago (Providence-St. Mel)
L 56 63 New Lenox (Providence Catholic)
1987A 141 146 1-1 (27-5) DNP Dave Wultzen
W 80 77 Chicago (Providence-St. Mel) (OT)
L 61 69 Beardstown
OTTAWA (TWP.) (7-12)
1949 39 43 0-1 (13-12) DNP Gil Love
L 39 43 Nashville
1952 47 57 0-1 (25-4) DNP Gil Love
L 47 57 Jacksonville (H.S.)
1953 123 122 1-1 (30-3) DNP Gil Love
W 80 66 Rock Island (H.S.)
L 43 56 Danville (Schlarman)
1957 238 240 3-1 (29-6) 3rd Gil Love
W 58 56 Pekin (2 OT)
W 54 51 Champaign (H.S.)
L 61 69 Collinsville
W 65 64 Quincy (Notre Dame) (OT)
1958 44 49 0-1 (22-10) DNP Gil Love
L 44 49 Peoria (Spalding)
1959 47 70 0-1 (24-8) DNP Gil Love
L 47 70 Peoria (H.S.)
1960 133 127 1-1 (31-2) DNP Gil Love
W 78 66 Pekin
L 55 61 Bridgeport
1961 45 61 0-1 (20-6) DNP Gil Love
L 45 61 Peoria (Manual)
1977AA 44 58 0-1 (26-2) DNP Dean Riley
L 44 58 Peoria (H.S.)
1978AA 95 94 1-1 (24-5) DNP Dean Riley
W 52 45 Peoria (H.S.)
L 43 49 Lockport (Twp.)
1983AA 48 55 0-1 (28-3) DNP Gary Vancil
L 48 55 Peoria (H.S.)
1985AA 133 146 1-1 (23-6) DNP Gary Vancil
W 67 65 Peoria (Richwoods)
L 66 81 Cahokia (H.S.)