The Stat Field Guide

Batting Average

Hits divided by at-bats. The most familiar hitting stat, but it treats all hits the same — a bloop single counts as much as a line drive double.

League avg ~.270. Elite >.330

On-Base Percentage

How often a batter reaches base. Includes hits, walks, and hit-by-pitches. More valuable than batting average because not making outs is the most important thing a hitter can do.

League avg ~.340. Elite >.400

Slugging Percentage

Measures power by weighting extra-base hits more heavily. A double counts twice as much as a single, a homer four times as much. Does not include walks.

League avg ~.420. Elite >.550

On-Base Plus Slugging

Combines getting on base (OBP) with hitting for power (SLG) into one number. Quick and easy way to evaluate a hitter, though it slightly undervalues walks.

League avg ~.730. Elite >.900

Isolated Power

Pure extra-base hit ability. Calculated by subtracting batting average from slugging percentage. A guy with a high average but low ISO is a singles hitter. High ISO means doubles and homers.

League avg ~.150. Power hitters >.200

Batting Average on Balls In Play

When a batter puts the ball in play (not a homer, not a strikeout), how often does it land for a hit? Useful for spotting luck — a hitter with a .400 BABIP is probably due to cool off, and one at .220 is probably better than the numbers show.

League avg ~.300. Very high or low suggests regression

Strikeout Rate

How often a batter strikes out per plate appearance. Lower is generally better — means the hitter is making contact and putting the ball in play.

League avg ~20%. Contact hitters <15%

Walk Rate

How often a batter draws a walk per plate appearance. Higher is better — shows plate discipline and the ability to lay off pitches outside the zone.

League avg ~10%. Patient hitters >14%

Weighted On-Base Average

The best single number for evaluating a hitter. Weights each way of reaching base — walk, single, double, triple, homer — by how many runs it’s actually worth. Unlike batting average, a homer counts way more than a single.

League avg ~.320. Star hitters >.400

Weighted Runs Created Plus

A hitter’s total offensive value compared to everyone else, adjusted for ballpark. 100 is league average. If a guy has a 150 wRC+, he’s creating 50% more runs than the average hitter.

100 = league avg. 130+ = all-conference caliber

OPS Plus

OPS adjusted for the ballpark and overall scoring environment. 100 means exactly average. Makes it fair to compare a hitter at a bandbox like LSU’s Alex Box Stadium to one at a pitcher’s park.

100 = avg. 130+ = elite

Earned Run Average

The classic pitching stat — how many earned runs a pitcher allows per nine innings. Lower is better. But it’s heavily influenced by defense and luck on balls in play, so it doesn’t always reflect how well a pitcher actually threw.

League avg ~4.50. Ace caliber <3.00

Walks + Hits per Inning Pitched

How many baserunners a pitcher allows per inning. Simple way to see how clean a pitcher works. A WHIP under 1.00 means less than one baserunner per inning — that’s dominant.

League avg ~1.35. Elite <1.00

Strikeouts per Nine Innings

How many batters a pitcher punches out per nine innings. Higher means more swing-and-miss stuff. The best power arms in college are north of 12.

League avg ~7.5. Power arms >10.0

Walks per Nine Innings

How many free passes a pitcher gives up per nine innings. Lower is better. A guy under 2.0 has elite command — he almost never beats himself.

Good <3.0. Elite <2.0

Home Runs per Nine Innings

How often a pitcher gives up home runs. The fewer, the better — home runs are the most damaging play in baseball and the hardest to recover from.

League avg ~1.0. Lower is better

Strikeout-to-Walk Ratio

Strikeouts divided by walks. The best way to measure a pitcher’s command at a glance. Elite pitchers strike out 4+ batters for every walk. Below 2.0 means control problems.

Good ≥3.0. Elite ≥4.0

Left On Base Percentage

When runners get on base, how often does the pitcher strand them there instead of letting them score? High LOB% looks great but tends to come back to earth — if a pitcher is stranding 85%+ of runners, some of that is luck.

League avg ~72%. Very high values regress

Fielding Independent Pitching

What a pitcher’s ERA should look like based only on things the pitcher controls: strikeouts, walks, hit batters, and home runs. Ignores defense, luck on ground balls, and bloop hits. Reads like an ERA — lower is better.

Scaled like ERA. League avg ~4.00

Expected FIP

Takes FIP one step further — replaces a pitcher’s actual home runs with what you’d expect based on league average rates. Smooths out home run luck. If a pitcher’s FIP is 2.50 but xFIP is 3.80, some of those low HR numbers might just be good fortune.

Scaled like ERA. More predictive than FIP

ERA Minus

ERA adjusted for ballpark and league scoring environment. 100 is exactly average. Lower is better — an 80 ERA- means the pitcher was 20% better than average. Makes it fair to compare a pitcher at Coors-level altitude to one at a sea-level park.

100 = avg. 80 = 20% better than avg

Rating Percentage Index

The NCAA’s formula for ranking teams. Combines a team’s own winning percentage with strength of schedule — who you beat matters as much as how often you win.

Hitting, At-bat quality, Velocity, Fielding

Blaze Sports Intel’s own composite score that evaluates hitters across four dimensions of player value. Combines offensive production, plate approach quality, bat speed indicators, and defensive contribution into a single scouting number.

Wins Above Replacement

How many extra wins a player gives his team compared to a readily available backup. Zero means you’re replacement level. In college, even 2-3 WAR over a season is a major contributor.

0 = bench guy. 3+ = All-American caliber