3 reasons why Trea Turner has regressed so much for Phillies in 2026

The Philadelphia Phillies have had quite the roller coaster of a 2026 season so far. Entering their four-game series against the Atlanta Braves in Philadelphia, the Phillies are 4.0 games out of the NL East lead, which is a miracle considering their standing earlier.

While their current outlook is good, the Phillies haven't had the kind of production they were hoping for from multiple key players. But the biggest concern so far has been the regression of Trea Turner.

ESPN's David Schoenfield revealed the three reasons behind Turner's regression, highlighting his poor batting average against fastballs, his awful defensive metrics, and his bad luck when making contact with the baseball.

3 reasons why Trea Turner has regressed in 2026

"Primary cause: Batting average down against fastballs; terrible defensive metrics due to lack of range; career-low BABIP compared to lifetime mark," Schoenfield writes.

The defensive regression of Turner is a major issue for the Phillies, as he went from a positive defender in 2025 with a 93rd-percentile rating to a fourth-percentile Fielding Run Value this season, according to Baseball Savant.

His major regression defensively is not the only reason why the Phillies' shortstop is having such a low-value season. His batting average against the fastball is also alarming.

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According to Baseball Savant, Turner's batting average against fastballs this season is .269, which might not seem bad, but compared to his .295 average last season against fastballs, it's a massive, near-30-point drop in batting average.

He's gone from 5.4 bWAR in 2025 to -0.5 bWAR in 2026 in roughly the same number of games played. His terrible defense is one of the big reasons why, and his fastball regression is another.

But the bad luck Turner has had is also playing a role. His BABIP (batting average on balls in play) is a .282 this season, the lowest of his MLB career, and way down from a .350 BABIP one year ago.

Between his struggles against the fastball, some bad luck with his BABIP, and his poor defense, Turner's regressed in a big way for the Phillies. It's a huge concern, and the only thing they can hope for is that he figures it out by the MLB postseason in a few weeks.

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