After a disappointing first month with the Giants, Darin Ruf is back in MLB. The former Yankee is hitting well against left-handed pitching. His 147 wRC+ against LHPs is tops in the Majors. In the series against the Marlins, Castano is scheduled to start. Ruf has one home run in five at-bats against LHPs this month. But he also struck out nine times.