This versatile (tuba / string bass / bass sax - just like Vinny Giordano) musician seems to be the odd man out in the Bix saga. I've never read any anecdotes about him, yet both he and Bix were with the Wolverines in '24 and Whiteman in '28, and Min is on Bix's last records for Victor in 1930. Did Leibrook just silently come and go and not leave an impression on anyone? Bix and he must have been on fairly good terms, to have shared such a track record. The fact of his membership in the Whiteman crew indicates a high level of musicianship.
One of my favorite recorded Wolverines moments comes in the last chorus of "Tia Juana," when Leibrook seems to play his tuba BACKWARDS. It's the tubic equivalent of Michael Jackson's "Moon Walk."