Stag beer was an advertiser on KAAY; in fact, come to think of it, I don't recall ever hearing it unless it was on some of the Beaker Street airchecks. Did they advertise during any other air shifts?
As an aside, my current supervisor said Stag beer was...well, less than desirable! For some reason, we got to talking on the subject of some things we haven't seen or who was out of business, and Schlitz, Falstaff and Stag came up.
Here's an ad for Stag beer for you to enjoy, courtesy of Barry Mac!