The way pitchers have attacked Ian Happ follows a similar approach. When the switch-hitting Happ bats from the left side, which has accounted for 73% of his plate appearances this year, right-handers like to test him with elevated fastballs. It’s a formula Chicago Cubs hitting coach Dustin Kelly has seen righties take with slugger Cody Bellinger. Focusing on being on time for fastballs has helped Happ be able to handle the pitch and be able to take advantage of mistakes in the zone. “Over the long haul, he knows that his swing is going to play out the way that it’s going to,” Kelly told the Tribune on Tuesday.