On January 20, 1949, at the age of 18, Sonny Rollins made his recording debut.
He played tenor sax in a 9 piece group backing vocalist Babs Gonzales. The horn arrangements by trombonist JJ Johnson, also a member of "Babs' band"
Sonny's first recorded solo starts at 1:17 here;
Babs had signed a recording contract with Capitol Records hence the title "Capitolizing"