Red Sox's Kenley Jansen uses 'invisible' 96 mph cutter to K Mike

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Kenley Jansen's cutter velocity higher in 2023

Kenley Jansen's Velocity is WAY UP

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What happened to Kenley Jansen? A look at the rules violations that triggered the Red Sox closer's blown save - The Boston Globe

What happened to Kenley Jansen? A look at the rules violations that triggered the Red Sox closer's blown save - The Boston Globe

Kenley Jansen introduced as Red Sox' new closer: 'When you come to Fenway … you feel like a kid again' - The Boston Globe

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Kenley Jansen's cutter velocity higher in 2023

Red Sox sign RHP Kenley Jansen: What he brings to the bullpen

UPDATED: Madison Bumgarner matches career high with 14 strikeouts, fires dominant one-hitter to send Giants soaring into All-Star break - Giants Extra