Braves (finally) promote Hayden Harris, activate Ha-Seong Kim
Briefly

The Braves shifted focus to roster moves and unpredictability rather than pursuing many September wins. Hayden Harris earned a promotion to Atlanta after repeated minor-league dominance, including strong results across Double-A and Triple-A this year despite prior Triple-A struggles. Harris posted a combined 0.56 ERA, 1.95 FIP, and 2.55 xFIP in 39 appearances and 48 innings, aided by high strikeout rates. The club acquired Ha-Seong Kim, whose immediate availability was delayed by travel. Kim's hitting appears serviceable so far, while his defensive progression and recovery warrant monitoring.
The biggest piece of news here is the eventual promotion of Hayden Harris to Atlanta. The saga has been a pretty winding and amusing one, as folks have been calling for Harris' promotion ever since he started dominating Double-A hitters back in 2023. He didn't get the promotion then, dominated Double-A again in 2024, but struggled in Triple-A. This year, he dominated both Double-A and Triple-A hitters, but wasn't promoted to the gong show / goon squad second-half-of-2025 Atlanta relief corps, until now, anyway.
Harris has a combined 0.56/1.95/2.55 ERA/FIP/xFIP line in the minors this year across 39 appearances spanning 48 innings. That line reflects absolutely obliterating Double-A, and doing well but not video game numbers-well in Triple-A. At least in the minors, he's sort of been your generic absurd numbers reliever - most relievers these days are able to post dominating lines via high strikeout and walk rates, with the strikeouts more than compensating for the free passes.
Read at Battery Power
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