These 2 Underused Running Back Metrics Are the Keys to Both Reality and Fantasy Wins: 1 Must-Draft Breakout RB and 4 More to Monitor Closely
Image Credit: Mark Goldman/Icon Sportswire. Pictured: Keaton Mitchell.

Blair Andrews searches through the advanced RB metrics to help you locate the breakout smash play of the 2024 season.

In previous installments of the RB breakout pieces we’ve looked both at how age and experience impact RB breakouts, and also at which metrics best predict future breakouts for non-rookies.

One question we haven’t investigated is why these breakouts tend to happen. Luckily we can approach this question in much the same way. While it’s true that many breakouts involve positive efficiency, that efficiency needs to be displayed when the player is on the field. In other words, we’re looking for players who can see an increase in opportunity. So what are the things that lead to opportunity? For the most part it’s metrics that add value (or perceived value) to an NFL team’s winning chances.

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The Metrics That Help NFL Teams Win . . . Will Help You Win

In the previous installment we noticed that broken tackles and missed tackles are two of the best predictors of coming breakouts, in part because those are plays on which an RB provides excess value for his team. But we have more direct measurements of value, such as expected points added and points earned, specialties of our data provider, Sports Info Solutions. These advanced metrics aim to measure the on-field impact of a player on his team’s winning chances. But how can they help fantasy players?

I’m investigating these metrics in the same way I did other advanced metrics. As a reminder, here’s the explanation I included in the earlier article.

To investigate what factors might signal a coming breakout, I pulled a bunch of RB metrics and transformed them into z-scores. The best way to think about a z-score is that it’s a version of a metric that is rescaled so that the average is 0 and the standard deviation is 1. Setting all metrics on a common scale like this allows us to make easier comparisons across metrics. And it allows us to compare each metric against a shared standard. A score of 1.5 always represents 1.5 standard deviations above the mean. Likewise a score of -1.5 always represents 1.5 standard deviations below the mean. It is for this reason that z-scores are sometimes referred to as standard scores.

After making this transformation we can compare breakouts against non-breakouts based on how they performed in these advanced metrics.

Separating RB Skill from Team Context

The chart below displays those results.

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Blair Andrews

Managing Editor, Author of The Wrong Read, Occasional Fantasy Football League Winner. All opinions are someone else's.

The Upcoming Rookie Class Is Breaking the Models, Part 3: The 2026 Wide Receiver Freak Score Leaderboard

We’ve already explored the top running back and tight end athletes in the 2026 rookie class. In both groups we found players setting new records and forcing us to rethink both our models and our priors. But Freak Scores were designed first and foremost to find wide receiver profiles with an advantage in the red zone and around the goal line. The theory has always…...

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The Upcoming Rookie Class Is Breaking the Models, Part 2: The 2026 Tight End Freak Score Leaderboard

Last time, we looked at the freak athletes of the 2026 class at the running back position, including one prospect who literally forces us to rescale the metric (look for some updates on that front coming soon). No RB who ran at the combine has a Freak Score below 50 — no RB who participated was slower than 4.56 seconds in the 40-yard dash. And the…...

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The Upcoming Rookie Class Is Breaking the Models: The 2026 Running Back Freak Score Leaderboard

At RotoViz, we like to look at NFL prospects’ collegiate production as a foundational data point in making predictions. The best predictor of whether a player will succeed in the NFL is whether they succeeded in college. But it would be a mistake to think that size and speed don’t matter. Indeed, for a long time, we’ve relied on Freak Scores to find wide receiver…...

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The Upcoming Rookie Class Is Breaking the Models, Part 3: The 2026 Wide Receiver Freak Score Leaderboard

We’ve already explored the top running back and tight end athletes in the 2026 rookie class. In both groups we found players setting new records and forcing us to rethink both our models and our priors. But Freak Scores were designed first and foremost to find wide receiver profiles with an advantage in the red zone and around the goal line. The theory has always…...

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The Upcoming Rookie Class Is Breaking the Models, Part 2: The 2026 Tight End Freak Score Leaderboard

Last time, we looked at the freak athletes of the 2026 class at the running back position, including one prospect who literally forces us to rescale the metric (look for some updates on that front coming soon). No RB who ran at the combine has a Freak Score below 50 — no RB who participated was slower than 4.56 seconds in the 40-yard dash. And the…...

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The Upcoming Rookie Class Is Breaking the Models: The 2026 Running Back Freak Score Leaderboard

At RotoViz, we like to look at NFL prospects’ collegiate production as a foundational data point in making predictions. The best predictor of whether a player will succeed in the NFL is whether they succeeded in college. But it would be a mistake to think that size and speed don’t matter. Indeed, for a long time, we’ve relied on Freak Scores to find wide receiver…...

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