| Player | Year Played | High School |
| O' Shaughnessy, Patrick | 1983 | Kapaun |
| O'Connor, D.J. | 1990 | Coffeyville |
| O'Connor, William | 1976 | Kapaun |
| O'Gara, Bill | 1975 | SM Miege |
| O'Gara, Guy | 1984 | SM Miege |
| O'Hair, Thane | 1981 | Elkhart |
| O'Neal, Donnie | 1998 | Olathe East |
| O'Sullivan, Peter | 1974 | St. Joseph of Shawnee |
| Ochs, Brad | 1997 | Gridley |
| Ochs, E.J. | 1998 | Trego Community |
| Odell, John | 1977 | Wellington |
| Oehm, Jim | 1984 | Marysville |
| Oehme, Kevin | 1998 | Liberal |
| Oeser, Jon | 1993 | Claflin |
| Oeser, Roy | 1977 | Kapaun |
| Ogan, James | 1980 | Bishop Ward |
| Ohl, Willis | 1997 | Garden City |
| Ojile, Todd | 1985 | Wichita SE |
| Oliphant, Kelle | 1982 | Goddard |
| Oliver, Doug | 1976 | Derby |
| Oliver, Jerome | 1991 | Wichita South |
| Organ, Daren | 1991 | Atwood |
| Orr, Mike | 1988 | Paola |
| Orr, Mike | 1979 | Ulysses |
| Orrick, Anthony | 1996 | Blue Valley Stilwell |
| Orth, Mike | 1983 | Liberal |
| Orvis, David | 1979 | Valley Center |
| Osborn, Frank | 1974 | West Elk |
| Osborn, Fred | 1976 | Howard West Elk |
| Oshel, Dave | 1994 | Ottawa |
| Oswald, Paul | 1982 | Hayden |
| Overacker, Dennis | 1980 | Wichita North |
| Owens, Willie | 1985 | Harmon |
| Ozbun, Ryan | 1998 | Blue Valley NW |
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