Interestingly, I can find no leader dates for McLean during the calendar year of 1958. His last session as a leader, according to jazzdiscography.com, lordisco, jazzdisco.org, was december 27, 1957, and the next session as leader was January 18th, 1959. I found two sessions as sideman, but they are 11 months apart: one with Sonny Clark in December 1958 and one with Donald Byrd in January 1958.
If there are any McLean biographers who would chime, I think it would be interesting to know what he was doing in that time, if he wasn't recording? I would think if he was at least touring that at least ONE of those live sessions would be recorded and included in his discography, but I cannot find anything.
-Jesse Soursourian, Administrative Assistant