The date is May 16, 2017, and over the last 15 games Trea Turner has been worth -0.3 Wins Above Replacement. If that sounds bad, that’s because it is bad. For Turner it’s not just a slump, a ding, a blip, it’s literally the worst fifteen game stretch of his entire Major League career. If you look at the linked graph, the next worst time in his career was his first fifteen games, where he was worth -0.1 WAR. Yet if you just waited two more measly games, Turner had upped his rolling average to an even zero, and from then on he has never been worth less than a replacement level player for any 15-game stretch in his entire career. That is, not until the first game of Sunday’s double header, where his rolling value (despite hitting a home run) dipped below zero for the first time since his 17th game in the bigs.

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