{"id":38861,"date":"2026-07-02T19:14:47","date_gmt":"2026-07-02T19:14:47","guid":{"rendered":"https:\/\/www.duck9.com\/blog\/?p=38861"},"modified":"2026-07-02T15:15:27","modified_gmt":"2026-07-02T19:15:27","slug":"correlation-john-bollman-on-rpm-revolution-per-minute-as-it-connects-to-injury","status":"publish","type":"post","link":"https:\/\/www.duck9.com\/blog\/correlation-john-bollman-on-rpm-revolution-per-minute-as-it-connects-to-injury\/","title":{"rendered":"Correlation John Bollman on RPM, Revolution Per Minute as it Connects to Injury"},"content":{"rendered":"
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Paul Skenes\u2019 four-seam fastball spin rate has declined sharply in 2026, falling from 2,318 RPM on April 1 to 1,987 RPM on July 1 according to @CodifyBaseball<\/span><\/a>\u2019s data.<\/span><\/p>\n

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The post lists bi-weekly averages showing a consistent downward trend exceeding 300 RPM over three months for the Pirates ace.<\/span><\/p>\n

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Read the at Replies <\/span><\/p>\n

widespread concern over possible arm fatigue or injury, with suggestions for rest, IL placement, or mechanical adjustments.\u200b\u200b\u200b\u200b\u200b\u200b\u200b\u200b\u200b\u200b\u200b\u200b\u200b\u200b\u200b\u200b\u200b\u200b\u200b\u200b\u200b\u200b\u200b\u200b\u200b\u200b\u200b\u200b\u200b\u200b\u200b\u200b\u200b\u200b\u200b\u200b\u200b\u200b\u200b\u200b\u200b\u200b\u200b\u200b\u200b\u200b\u200b\u200b\u200b\u200b<\/span><\/p>\n<\/div>\n

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One of the first things I was asked when I walked into the High Performance department with the Blue Jays\u2026 Whats the best indicator of injury? \u2026well, its this. 4-seam fastball spin rate decrease.<\/div>\n<\/td>\n<\/tr>\n
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John Bollman (@JohnBollman11) 2K likes \u00b7 17 replies<\/font><\/a><\/div>\n
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WordPress\u2019d from my personal iPhone, 650-283-8008<\/a>, number that Steve Jobs texted me on<\/span><\/div>\n

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What They Will NEVER Teach You at Stanford Business School<\/font><\/a><\/div>\n
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Paul Skenes\u2019 four-seam fastball spin rate has declined sharply in 2026, falling from 2,318 RPM on April 1 to 1,987 RPM on July 1 according to @CodifyBaseball\u2019s data. The post lists bi-weekly averages showing a consistent downward trend exceeding 300 RPM over three months for the Pirates ace. Read the at Replies  widespread concern over […]<\/p>\n","protected":false},"author":1,"featured_media":38862,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-38861","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/www.duck9.com\/blog\/wp-json\/wp\/v2\/posts\/38861","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.duck9.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.duck9.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.duck9.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.duck9.com\/blog\/wp-json\/wp\/v2\/comments?post=38861"}],"version-history":[{"count":0,"href":"https:\/\/www.duck9.com\/blog\/wp-json\/wp\/v2\/posts\/38861\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.duck9.com\/blog\/wp-json\/wp\/v2\/media\/38862"}],"wp:attachment":[{"href":"https:\/\/www.duck9.com\/blog\/wp-json\/wp\/v2\/media?parent=38861"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.duck9.com\/blog\/wp-json\/wp\/v2\/categories?post=38861"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.duck9.com\/blog\/wp-json\/wp\/v2\/tags?post=38861"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}