There is no mincing words; the Arizona Diamondbacks' rotation had been nothing short of abysmal in recent play — until Tuesday night against the Pittsburgh Pirates. In the midst of a four-game losing streak, and some of the worst starting pitching results in recent history for Arizona, left-hander Eduardo Rodriguez took the mound for one of his most dominant starts in a Diamondbacks uniform. Rodriguez threw 103 pitches, and used all of them to engineer a seven-inning shutout performance. He allowed only two base knocks, and counteracted three walks with seven punchouts. It was a welcome sight to behold for the Chase Field faithful, who had not seen their home team play in person in nearly two weeks. It was also all the D-backs needed to set the tone for a strong, 9-0 blowout win to open their homestand.…