Here's a look at Texas Tech's overall performance in the NCAA Tournament, broken down by coach at the time.
Texas Tech (8-15)
Polk Robison
1954 _ lost to Santa Clara 73-64.
1956 _ lost to Southern Methodist 68-67.
1961 _ lost to Cincinnati 78-55; beat Houston 69-67.
Gene Gibson
1962 _ beat Air Force 68-66; lost to Colorado 67-60; lost to Creighton 63-61.
Gerald Myers
1973 _ lost to South Carolina 78-70.
1976 _ beat Syracuse 69-56; lost to Missouri 86-75.