Isn't it in contradiction with your July 23, 2013 hint ? Or is the almost homonymous Cubs pitcher somebody else than Zick ?
Edit : is it Robert "Bob" Zilk ?
I see your point - my clue was not well-worded.
Regardless, searching for a few other words in previous entries ("heap"; "Walla Walla") would have led to the answer.
Regardless, you found the solution!