Is Bobby Dalbec’s Improved Plate Discipline Sustainable?
Given his rise from dark horse to odds-on NL MVP favorite, it’s not a huge surprise that Bryce Harper has been the best hitter in baseball since August 1. Through Sunday’s action, he slashed.346/.464/.795 in 198 plate appearances, good for a 216 wRC+. That performance has catapulted him to the very top of the race, moving ahead of Fernando Tatis Jr. in betting markets as of Monday. A lot thus has been said about Harper, but much less has been written about the second-best hitter over this stretch (among the 251 players to amass at least 100 plate appearances). That hitter, as you could probably guess from this piece’s title, is Red Sox infielder Bobby Dalbec, whose .316/.409/.737 line nearly matches Harper’s, though it has come without the associated fanfare.
That’s understandable given Dalbec’s start to the season. Unlike Harper, who posted very good numbers before his recent stretch of sheer fire, Dalbec nearly found himself without a spot on Boston’s roster following the team’s trade for Kyle Schwarber. Through July 31, Dalbec was slashing just .216/.260/.399, with a 4.4% walk rate, a 37.5% strikeout rate, and 11 homers in 296 trips to the dish. That, coupled with less-than-stellar defense (it’s still rated as a negative), gave the Red Sox every reason to option him to Triple-A. Indeed, as Peter Abraham at The Boston Globe wrote on September 12, “That Schwarber was on the injured list at the time may have been what kept Dalbec on the roster.”
The hot start to Dalbec’s career last season — a 152 wRC+ and eight homers in just 92 plate appearances — seemed unsustainable given the small sample size, 42% strikeout rate, and .394 BABIP. As a result, ZiPS projected him for a 91 wRC+ this season, though Steamer was more bullish at 103. The poor start and the hot stretch since have resulted in season stats — a .245/.306/.497 slashline and 111 wRC+ — roughly in line with what I’d peg as his true talent level. Read the rest of this entry »