Semi-Eh? Blue Jays Snag Marcus Semien on One-Year Deal
The Blue Jays had already made a splash in free agency, signing George Springer to a six-year deal last week. They added to their haul yesterday, signing Marcus Semien to a one-year, $18 million contract, as Jeff Passan first reported.
Most of the deals that have gone through so far this offseason have exceed both Craig Edwards’ projections and our crowdsourced estimates. It’s been a slow offseason, sure, but not an abnormal one when it comes to the players who have actually signed. Semien breaks that trend, and it’s worth looking back at his career to see how we ended up here.
Stop your tape after 2018, and Semien looked like a competent but unspectacular regular. His batting line was almost metronomic — 97 wRC+ in 2015, 98 in ‘16, 97 in ‘17, and 97 again in ‘18. There were glimmers of something interesting going on — his strikeout rate kept dipping, he increased his contact rate without sacrificing power, and he put the ball in the air to the pull side frequently. Still, at some point you are what you are, and Semien looked like an average hitter.
One very interesting thing happened to Semien in 2018, however. He’d long been regarded as a defensive liability, both by the eye test and by advanced defensive metrics. From 2013 to 2017, DRS pegged him as 8 runs below average at shortstop, while UZR was far more pessimistic at 20 runs below average. Worse than average (for a shortstop) with his glove, roughly average with his bat — Semien looked like a league average player, a nice but forgettable piece for the A’s.
In 2018, Semien’s defense suddenly improved. It’s possible that it was already headed that way, that opinion (and noisy statistics) lagged reality. In 2015, the A’s went full Brad-Pitt-in-Moneyball and brought in Ron Washington to teach Semien defense, and it worked. Read the rest of this entry »