If you have looked at a baseball box score or a player’s stat line, you have probably seen the abbreviation BB and wondered what it stands for. In baseball, BB means base on balls — better known as a walk. It records the times a batter reached first base without swinging the bat into a hit, simply because the pitcher failed to throw enough strikes. This guide explains what a walk is, how one is earned, how it shows up in the numbers, and why a patient hitter who draws walks can be so valuable to a team.
What Does BB Stand For?
BB is short for base on balls. The name is old-fashioned but literal: the batter earns a base because of the balls (pitches) the pitcher threw. In everyday conversation, players, coaches and commentators almost always just call it a “walk.”
A walk is one of the most common ways to reach first base without putting the ball in play. It is tracked in its own column in every box score and season stat line, and it feeds into several more advanced numbers that measure how good a hitter is at reaching base. If you are still learning the shorthand, our plain-English baseball terms glossary breaks down the other abbreviations you will run into.
How a Walk Is Earned
Every pitch to a batter is judged as either a strike or a ball. A ball is a pitch that lands outside the strike zone — the area over home plate roughly between the batter’s knees and the midpoint of their torso — and that the batter does not swing at. When a batter receives four balls in a single plate appearance, the umpire calls “ball four” and awards the batter first base. That is a walk.
The key detail is that the batter does not have to do anything except avoid swinging at bad pitches. A walk therefore reflects two skills at once: the hitter’s plate discipline (laying off pitches out of the zone) and, on the other side, the pitcher’s lack of control. This is why drawing walks is part of the battle between pitcher and hitter on every pitch.
Intentional Walks (IBB)
Sometimes a team chooses to walk a batter on purpose. This is an intentional base on balls (IBB), and it is usually used to avoid pitching to a dangerous hitter, to set up a force play, or to face a weaker batter next. Since 2017, Major League Baseball has allowed a manager to signal an intentional walk from the dugout without the pitcher throwing the four pitches. Intentional walks still count as walks in the BB column, but they are also tracked separately as IBB.
How a Walk Differs From a Hit-by-Pitch
A walk is not the only way to reach base without a hit. If a pitch strikes the batter, they are awarded first base as a hit-by-pitch (HBP). Both put a runner on base without a base hit, but they are recorded as different stats. Both a walk and a hit-by-pitch count toward on-base percentage, yet neither counts as an at-bat, so neither one lowers a hitter’s batting average.
Quick Facts
| Abbreviation | BB |
| Full name | Base on balls |
| Common name | Walk |
| How it is earned | Batter takes four balls in one plate appearance |
| Result | Batter is awarded first base |
| Counts as | A plate appearance and a time on base (not an at-bat, not a hit) |
| Effect on batting average | None — a walk does not lower batting average |
| Effect on OBP | Included — raises on-base percentage |
| Related stats | BB% (walk rate), OBP, IBB (intentional walk) |
Why Walks Matter: OBP and Walk Rate
On its own, a single walk looks minor. Across a season, however, walks add up and shape the numbers that teams use to value a hitter. The most important of these is On-Base Percentage (OBP), which measures how often a batter reaches base by any means — hits, walks and hit-by-pitches — rather than only counting hits the way batting average does. Because walks are included, a disciplined hitter can carry a strong OBP even during a stretch of few hits.
OBP is also a building block of OPS (on-base plus slugging), one of the most popular all-round hitting stats. And just as walks help a hitter’s numbers, they hurt a pitcher’s: every walk a pitcher allows counts against their WHIP (walks and hits per inning pitched), a common measure of how many baserunners a pitcher gives up.
Reading Walk Rate (BB%)
Walk Rate, written as BB%, tells you how often a hitter walks per trip to the plate. It is simply the number of walks divided by total plate appearances, expressed as a percentage. A hitter who walks in 12 of every 100 plate appearances has a 12% walk rate. Because it is a rate rather than a raw total, BB% lets you compare players who have batted a different number of times. The table below shows the widely used rule-of-thumb tiers; league-average figures drift slightly from season to season, so treat them as a guide rather than fixed lines.
Walk Rate Benchmarks
| Rating | Walk Rate (BB%) |
|---|---|
| Excellent | 15.0% |
| Great | 12.5% |
| Above average | 10.0% |
| Average | 8.0% |
| Below average | 7.0% |
| Poor | 5.5% |
| Awful | 4.0% |
Rule-of-thumb tiers for hitter walk rate. Source: FanGraphs Sabermetrics Library; league averages vary by season.
BB in Box Scores and Player Records
In a box score, walks appear in the BB column next to a batter’s name, showing how many they drew in that game. Over a season and a career, that total becomes a marker of plate discipline. The all-time career leader is Barry Bonds with 2,558 walks, ahead of Rickey Henderson (2,190) and Babe Ruth (2,062). Bonds also owns the single-season record of 232 walks, set in 2004, a season in which pitchers were so wary of him that he was intentionally walked a record 120 times.
These names underline a simple point: elite plate discipline is a durable, repeatable skill. Hitters who consistently draw walks reach base more often, extend innings and force pitchers to throw more pitches, which is why walk totals sit alongside more familiar counting stats such as RBIs in a full picture of a batter’s value.
How Walks Shape Game Strategy
Beyond the individual stat line, walks influence how an inning unfolds. A walk puts a free runner on base, and more baserunners mean more chances to score. Long, patient at-bats also drive up a pitcher’s pitch count, which can tire a starter and force a team to go to its bullpen earlier than planned. On defence, a pitcher’s ability to limit walks keeps runners off base and protects earned-run totals — the reason walks are watched closely alongside a pitcher’s ERA (earned run average). In a close game, a single well-timed walk can load the bases or start a rally, turning a quiet inning into a scoring threat without a ball ever leaving the infield.
Sources
Frequently Asked Questions (FAQ)
What does BB stand for in baseball?
BB stands for base on balls, which is the official name for a walk. It is recorded when a batter is awarded first base after taking four balls (pitches outside the strike zone that they do not swing at) in a single plate appearance.
Does a walk count as a hit or an at-bat?
No. A walk is neither a hit nor an official at-bat. Because it does not count as an at-bat, a walk does not lower a batter’s batting average, but it does count as a plate appearance and a time on base, so it raises on-base percentage.
What is the difference between BB and IBB?
BB counts all walks, while IBB counts only intentional walks — those a team gives on purpose to avoid pitching to a batter. Every intentional walk is included in the BB total and is also tracked separately as IBB.
What is a good walk rate (BB%) for a hitter?
Walk rate is walks divided by plate appearances. As a rough guide, around 8% is league average, 10% is above average, and 15% or higher is considered excellent. Because league conditions change, these tiers are estimates rather than fixed thresholds.
Who has drawn the most walks in Major League Baseball history?
Barry Bonds holds the career record with 2,558 walks, followed by Rickey Henderson with 2,190 and Babe Ruth with 2,062. Bonds also set the single-season record of 232 walks in 2004.
