Dodgers moving seven-time All-Star to shortstop

The Dodgers are flipping their middle infield alignment. Mookie Betts is getting the start at shortstop while Gavin Lux will be at second base for Friday evening’s Cactus League matchup against the Reds. Manager Dave Roberts called the switch “permanent, for now” when chatting with reporters (link via Fabian Ardaya of The Athletic).

While that leaves open the possibility of the Dodgers returning to their previous arrangement at some point, Betts is going to open the season at the infield’s toughest position. The Dodgers entered camp planning to have the former MVP at second base with Lux at shortstop. The latter’s inconsistent throwing accuracy this spring changed the equation, as Roberts acknowledged Thursday night.

There’s no question about Betts’ premium athleticism and overall defensive acumen. Still, this is a notable bet to place on a player with so little infield experience at the MLB level. Betts didn’t play the infield regularly as a Major Leaguer until last season. The Dodgers gave him 485 innings at second base and 98 frames at shortstop. Betts drew a strong +6 grade from Defensive Runs Saved at the keystone. Statcast, on the other hand, estimated he was one run below par. His sample as a shortstop is too small to draw significant conclusions, although he was charged with three errors there against only two errors at second base.

That Betts immediately played a solid second base after spending most of his 10-year MLB career in right field offers some optimism about his chances of handling the left side of the infield. Yet it’s clearly not what the Dodgers intended coming into camp. Betts at least had ample second base experience during his time as a prospect in the Red Sox’ system, logging almost 2000 innings there before being pushed to the outfield thanks to the presence of Dustin Pedroia. His minor league shortstop experience consisted of 13 starts between rookie and short-season ball in 2011-12.

The left side infield defense now becomes an important storyline for the Dodgers. Betts will be joined on most days by third baseman Max Muncy, a below-average defender who’s in the lineup for his bat. The Dodgers have a few shortstop-capable options off the bench. Miguel Rojas is a plus defender. Enrique Hernandez and Chris Taylor can log shortstop action as part of their utility responsibilities. Rojas hasn’t produced much offensively over the past two seasons, though, while neither Hernandez nor Taylor is a good fit for everyday shortstop work.

Lux will move back to second base. He has spent the majority of his MLB career there after moving off shortstop as a prospect. That was partially because the Dodgers had Corey Seager and Trea Turner, respectively, through the 2022 season. It was also a reflection of anxiety-related throwing issues that Lux battled when he was a prospect. Public defensive metrics have graded him as an above-average second baseman. His throwing has been less of an issue on the right side of the diamond. He has plus range for the position.

Keeping Lux in the starting lineup at all is a calculated move on the Dodgers’ part to maximize their offense. They could have bumped him to the bench or optioned him to Triple-A once they determined he wasn’t a viable shortstop. That would have allowed them to keep Betts at second and install Rojas back into the lineup. Doing so would have subtracted a promising bat, though. The lefty-swinging Lux had a solid .276/.346/.399 line over 471 plate appearances in 2022, making him a much better offensive contributor than Rojas. He missed all of last season after tearing the ACL in his right knee during spring training.

Roberts indicated that Betts could occasionally slide back to second base on days when Lux is out of the lineup. That would most frequently come against left-handed pitching and allow a right-handed hitter like Rojas, Hernandez or Taylor to step in at shortstop. They could also time those substitutions to improve the infield defense when they’re starting a ground-ball pitcher like Bobby Miller. L.A. has a few key high-grounder relievers (e.g. Brusdar Graterol, Blake Treinen, Ryan Brasier) who would also benefit from a better defensive alignment behind them late in games.