Marcus Semien, the Quietest Star

Marcus Semien is up to his usual tricks. He’s eighth among all position players in WAR, comfortably the best on a first-place Rangers squad. For the third straight year and the fourth out of five, he’s on track to rack up four-plus WAR as one of the two best players on his team. For someone who didn’t post an above-average batting line until his seventh major league season, it’s an impressive accomplishment.
Perhaps more impressive to me: he’s doing it right under our noses, and no one seems to notice. Semien is good at everything but not in a way that adds up to a tremendous offensive line. His best skill might be durability. He’s clearly a very good player, but his particular set of skills are highlighted by the framework we grade him under. I’m interested in Semien as a player, and I’m also interested in why he’s the poster boy for both what WAR gets right and where it has limits.
Let’s start with how Semien does it. It’s fairly straightforward: he’s above average at every phase of the game. It begins with his plate discipline. To put it simply, he doesn’t make bad decisions about when to swing. In each of the past five years, he’s accomplished an impressive double: chasing fewer pitches than league average and simultaneously swinging at more in-zone pitches than league average. To state the obvious, that’s a great way to both rack up a pile of walks and avoid strikeouts. Read the rest of this entry »