Born in Checotah, Oklahoma, Killingsworth played college basketball at Northeastern State College in Tahlequah and began his coaching career in 1948 at the high school level in Oklahoma. After many years of success, he left for the college ranks to coach the freshman team at Tulsa, then took a head coaching job at Cerritos College in southern California in 1964. In seven seasons at Cerritos, Killingsworth compiled a 157–46 record and led the Falcons to the 1968 California junior college championship.
In March 1971, he was hired as head coach at Idaho State in the Big Sky Conference, succeeding Dan Miller.[1][2] In his six seasons in Pocatello, Killingsworth led the Bengals to a 109–54 (.669) record, including three Big Sky regular-season titles and the second tournament title in 1977. The 1976–77 season was his last at ISU and was capped off by a run to the Elite Eight of the NCAA tournament, following a one-point upset of UCLA in the Sweet Sixteen in Provo, Utah, behind the play of seven-foot (2.13 m) center Steve Hayes.[3][4][5][6] The Bengals led by a point at the half against UNLV, but lost by seventeen and ended the year at 25–5.[7][8][9]
Following his successful run at Idaho State, Killingsworth was hired as head coach at Oklahoma State after Kansas State's Jack Hartman took the job and resigned two days later.[10][11] After two losing seasons, the first in his career at any level, he left the Cowboys to take the head coaching job at TCU in the Southwest Conference(SWC).[12][13] Nicknamed "Killer" during his time at Fort Worth, Killingsworth raised the profile of a school that had experienced limited basketball success in recent seasons. In eight seasons, he led his team to a 130–106 record, and in 1986–87, he led the team to a 24–7 record, an SWC title, and the team's first NCAA tournament appearance in 16 years.[14] Following that season, Killingsworth retired after 38 years of coaching.[15]
Killingsworth died in Tulsa in 2007 at age 83.[16]
National champion
Postseason invitational champion
Conference regular season champion
Conference regular season and conference tournament champion
Division regular season champion
Division regular season and conference tournament champion
Conference tournament champion
1974 team won an unscheduled playoff game for the NCAA berth
References
^"ISU selects hoops coach". Spokane Daily Chronicle. (Washington). Associated Press. March 25, 1971. p. 23.