Cook went 2-for-4 with a three-run homer in Wednesday's loss to the Cardinals.
After going down on strikes in each of his first two at-bats, Cook launched a two-out, three-run homer in the top of the sixth to put Pittsburgh on top 5-4. He would later add a leadoff single in the ninth to give him his second multi-hit performance of the campaign. The long ball was also the first of Cook's big-league career, and he now has five RBI through his first eight games, though he's batting just .208 (5-for-24) over that stretch.