Property of Nick Brennan
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RRI Week 2 – 2025 Season
Week Of 04/14/25 Next Update On 04/21/25 RRI (Reliever Reliability Index) formula, now including all implemented components with a clear step-by-step structure. 🧮 Step-by-Step RRI Formula (2025 Model) ⚙️ Step… Read more.
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🧮 Introducing the Reliever Reliability Index (RRI) #001
In today’s evolving baseball landscape, the role of the modern reliever is anything but static. Gone are the days of rigid 9th-inning assignments and simple save tallies. The bullpen has… Read more.
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🧮 Reliever Reliability Index (RRI) v2.6 #003 A Step-by-Step Formula
🥇 Step 1: Role-Based Base Score This is your starting point. It’s based on how the pitcher is used, not just their title. Role / Situation Base RRI Closer /… Read more.
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The Positional Puzzle: How Data Science Dissects Fantasy Sports and Finds the Gaps
Fantasy sports is war. But not with swords. It’s math and madness—risk and regressions—running wild on spreadsheets at 2AM. And if you’re serious about it, you don’t draft a tight… Read more.
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🧮Reliever Reliability Index (RRI) #002
Reliever Reliability Index (RRI) Created by xSTATx | Launched 2025The Reliever Reliability Index (RRI) is a proprietary scoring system that evaluates MLB and MiLB relievers based on a dynamic blend… Read more.
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How To Use Data Science & Machine Learning to Create Pre-Draft Rankings for Fantasy Baseball Leagues
04/2025 ✍️ Author: Nick Brennan 🏁 The Goal Ain’t Just Ranking It’s Predictive Advantage Anyone can build a top 300 player list, slap names in tiers, and pretend they’re ready… Read more.
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