But isn't the pitcher's job run prevention rather than home run prevention? The two are somewhat related obviously, but if you want to make an argument that Morris' numbers look worse because of the parks he played in don't you have to look at more than just home runs? BBref's park factors show Tiger Stadium having a fairly neutral average overall park factor from 1979-1990 (99.2).
Not to mention Buehrle's pitched most of his career at U.S. Cellular Field, which has played out as a bandbox.