Bukowski was a big fan of the L.A. Rams football team. He loved going to boxing matches at the Olympic Auditorium downtown.
In one of his books of letters in the early 1960s there are numerous references to co-workers getting excited about the LA Dodgers (they were good then) and how he hated listening to them talk about it all the time.
There is a poem, title escapes me, where he discusses a baseball batting lineup of writers with him and Hemingway in the order, sports being an accessible language this shouldn't be too shocking.
He hated "artists" a lot more than pro-athletes.