No. It’s silly.
The AL East was a combined 449-361. Now against other AL East teams, the divisions aggregate record was .500, because it always is in every sport ever played. Against non-AL East teams, the AL East teams were 88 games over .500.
The combined record of the NL West was 404-406, which means again non-NL West teams, the division was under .500.
The Diamondbacks pitching was actually comparable to the Red Sox, but good enough in that weak division. They only won 6 more games, while playing in a division of weaker teams. This isn’t that much of a stretch.
We were all disappointed with the Sox staff this year, but it wasn’t the worst pitching staff in MLB. And it was helped out by what turned out to be a very good bullpen…