The Cardinals have won championships ranging from the conference level up to the national level. At the national level, the Cardinals won the
NAIA National Championship in Singles and Doubles in 1955, 1956, 1957, 1958. The Cardinals also won the NAIA singles championship in 1959, and 1960. At the NCAA College Division level, the Cardinals won the National Singles Championship in 1967. The Cardinals won an NCAA College Division Regional Championship in both Singles and Doubles 1962. At the
NCAA Division I level, the Cardinals won three Southland Conference tournament championships and represented the Southland Conference in the NCAA Division I Men's Tennis tournament in 2016, 2017, and 2018. The Cardinals also won the Southland Conference regular season championship at the NCAA Division I level (1975, 1976, 2016, and 2017). The Cardinals won the
WAC regular season championship in 2022. In addition, Lamar won the Southland Conference regular season championship at the NCAA College Division level (1967 and 1973); at the NCAA Division II level (1974); and at the NCAA Division I level (1975, 1976, 2016, and 2017). ==Honors==