BRADENTON, Fla. — At the outset of spring training, Pirates right-hander Joe Musgrove began working on his fastball. Yet, that’s not the most important pitch for him in camp this year.



Being able to spot his four-seamer in all four parts of the strike zone is how Musgrove establishes his release point. It’s a solid, basic first step. Over the next couple of weeks, things will get more complicated and more interesting.



Every pitcher has one pitch to which he will devote the most attention during spring training. For Musgrove, it’s his cutter, a pitch that wasn’t even in his repertoire until 2017.



“I kind of just busted it out in a game two years ago because it felt like a good pitch for a certain hitter,” Musgrove said. “It turned out really good. I got some good results with it, and it showed up good on TrackMan, so I kept working on it. Last year, it was a really good weapon for me, and I used it all...