The University Interscholastic League maintains online archives of UIL playoff scores. To access these records, go to UILTexas.org and look under the Athletics tab and the Archives sub-tab. When you reach the archives page, click on the Full State Tournament results of Additional Sports link.
As of 2015, playoff scores for most sports dating back to 1983 are available in the archive. Organized by the University of Texas at Austin in 1910 to provide leadership to Texas public schools debate and athletic coaches, the UIL now organizes and administers regional and state interscholastic playoffs for its member schools in 14 different sports, including football, girls and boys basketball, baseball and softball.