Yeah, Gammon was the sports editor of a newspaper in Tennessee (I forget which one) from 1933 on, and he sometimes wrote for national sports publications too. At the link below is an article about baseball cards that he wrote for the January 11, 1945 Sporting News, which I believe was the first article about baseball cards in a national publication.
http://www.net54baseball.com/showthread.php?t=238775
Later in 1945 he began writing a semi-regular column about sports collecting (mostly things other than cards) for Sports Exchange Trading Post. After that publication went under in 1950, he wrote intermittently for Sport Fan and other hobby publications in the 1950s and 60s, and for Ballcard Collector and then SCD in the 70s. His SCD column continued into the early 1980s.