Kyle Tucker and Edwin Díaz’s Issues Probably Aren’t Disappearing Soon

The Dodgers’ highly paid stars just concluded the worst month of their careers. There are reasons to believe it won’t get much better this season.

Kyle Tucker slashed .195/.293/.310 for a .603 OPS in August. | David Crane/Getty Images

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How much longer will the Dodgers ride with Tucker? The occasional run-scoring hit inevitably sparks talk about how Tucker may be “turning the corner” or that he “found something.” There is no such hard evidence.

Tucker slashed .195/.293/.310 in August. The .603 OPS makes it the worst month of his career (min. 12 games). He has hit rock bottom, which is evident in how he recently changed his swing to try to change his fortunes.

Tucker’s natural swing includes an arm bar, in which the lead arm “bars” or straightens, causing the barrel to dip behind the body. It’s not a preferred style, but Tucker is one of plenty of successful hitters to hit this way. Among them are Derek Jeter and (slightly) Ted Williams, as you can see here.

Kyle Tucker, Derek Jeter and Ted Williams.

Recently, Tucker has taken to loading with his hands close to his head and the bat cocked, rather than “laying” the bat behind him. It’s a method similar to Max Muncy.

MLB

But the swing change is not working. When Tucker used his arm bar, the barrel entered the hitting zone early (or behind the contact point), giving him more time to adjust to pitches. With the new path, the barrel enters the hitting zone later. It is in-and-out of the zone faster, giving him less time to adjust with a steeper, shorter swing.

Tucker Swing Metrics

Period	Launch Angle	Tilt
March-July	18°	36°
August	21°	37°

The less time the barrel is in the hitting zone, the more vulnerable a hitter becomes to changes in speed. Tucker is getting dominated by pitches at both ends of the speed spectrum, elite velocity and off-speed. His profile this year by pitch type is that of a classic “slider bat speed” hitter.

Tucker by Pitch Type

Year	95+ mph	Off-Speed	All Others
2024	.277	.300	.281
2025	.250	.231	.276
2026	.210	.198	.244

Moreover, though Tucker is primarily a pull, fly ball hitter, he has lost the ability to cover pitches by driving them the other way, an indication of staying on the ball. Look at his hit spray charts from the past three seasons to see how his extra-base opposite power has cratered to almost nothing.

MLB

Most mystifying of all is how Tucker’s offensive problems have bled into his entire game. The Dodgers should be alarmed how badly Tucker’s baserunning and fielding also have fallen off.

Tucker Percentiles

Year	Batting	Baserunning	Fielding	Bat Speed	Range
2025	90	78	51	48	25
2026	27	49	5	35	2

You might be thinking about turning Tucker into a platoon player, but he has hit lefties better than righties (.250-.219). You should be thinking about batting him lower in the lineup. He has hit below the sixth spot only 13 starts this year. The bottom line is the Dodgers have a .228 hitter who is trying to change his swing midseason and who defensively ranks dead last among 123 outfielders in outs above average.

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Breakdown of the Week: Edwin Diaz’s Arm Angle

Don’t think Edwin Diaz automatically jumps into the closer role for the Dodgers once he comes off the IL. His injury-plagued season also is troubled by mechanical issues he needs to get straightened out. As you can see in this week’s breakdown and in the following chart, his release point and his arm angle have been dropping.

MLB

The lower arm slot is doing a number on his slider. Diaz always has had a great chase slider, a pitch that looks like a strike until it dive bombs to his arm side out of the zone. But this year he is throwing too many sliders that are non-competitive—balls right out of his hand that don’t force a swing decision.

Diaz’s Slider

Year	BA	Zone%
2025	.179	55.4%
2026	.323	58.6%

Two-pitch relievers are scary because if hitters can dismiss one pitch—well, you do the math. Diaz’s fastball is getting waffled (.333 with .778 slug) because A) his velocity is down a tick and B) his arm angle is lower and C) his slider isn’t competitive enough to get hitters off his heater.

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