Understanding the Bowling Series Average: A Deeper Metric Than Game Average
The Legacy of League Play and the Series Average
The National Bowling League’s story is a unique chapter in sports history, a bold experiment that brought team-based bowling to the forefront in the early 1960s. As documented on the official history site, the league featured franchises like the Dallas Broncos and the KC Stars, complete with statistics, interviews, and a level of professional organization rarely seen in the sport at that time. It was a one-year wonder, but its legacy lives on in the traditions of league play that continue in bowling centers across the country. That heritage of structured competition naturally leads to the questions modern bowlers ask when they step onto the lanes. One of the most common is about scoring formats, particularly the concept of a series. For anyone new to league play, understanding what a bowling series average means is essential. It moves beyond a single game and looks at performance over a set of games, typically three, which forms the standard unit of competition in most leagues. This measurement provides a more stable picture of a bowler’s skill level than any single game could offer.
Game Average vs. Series Average: The Core Difference
When you first start bowling in a league, the most common statistic you hear is your 'average.' Usually, this refers to your game average—the mean score of a single game. However, as you get more involved, you’ll hear the term 'series average.' While they sound similar, they measure different things and serve different purposes in league play. This article breaks down the difference, how each is calculated, and why the series average matters for your overall performance picture. A game average is the simplest metric: it is the total number of pins you knock down in all your individual games, divided by the number of games you have bowled. For example, if you bowl three games and score 150, 160, and 170, your game average is (150 + 160 + 170) / 3 = 160. This number tells you your typical single-game output. It is the baseline most bowlers use to track improvement or compare themselves to others.
Calculating Series Average: A Session-Based Metric
A series average is a bit more nuanced. In league bowling, a 'series' is a set of games bowled in one session—typically three games. Your series average is the average of your *total series scores*, not the average of your individual games. To calculate it, you add up the total pins from each complete series you have bowled, then divide by the number of series you have bowled. For instance, if you bowl three series over three weeks, and your totals are 480, 510, and 450, your series average is (480 + 510 + 450) / 3 = 480. Notice that this is *not* the same as your game average multiplied by three. Your game average might be 160, but your series average could be 480 or 470, depending on how consistent you are within each series. The core difference lies in what each metric emphasizes. A game average smooths out all your games into one number. It treats a 200 game and a 120 game the same way it treats two 160 games—they all just contribute to the mean. A series average, however, captures *within-session consistency*. It rewards bowlers who are steady across all three games and penalizes those who have one great game and two poor ones.
Why Leagues Use Series Average and Its Variations
Most sanctioned leagues (like those under the United States Bowling Congress, or USBC) actually use *game average* for handicap calculations and standings. However, many leagues also track series average for a few specific reasons: 1. Award Qualification: Some leagues give awards for high series (e.g., a 600 or 700 series). Your series average helps determine if you are improving at the session level, not just the game level. 2. Team Strategy: In team leagues, a bowler with a high series average but a lower game average might be more valuable in a position where consistency matters (like anchor or lead-off), because they are less likely to have a catastrophic collapse in the third game. 3. Self-Assessment: For your own development, series average reveals a hidden truth: a single great game can inflate your game average, but a series average forces you to look at your whole night’s work. If your game average is 170 but your series average is only 480 (which is 160 per game), you know you are inconsistent—you are having some 190s and some 150s, rather than steady 170s. It is critical to note that the definition of a 'series' can vary. In most standard league play, a series is three games. But some leagues bowl four-game series, especially in doubles or special events. In those cases, your series average would be based on four-game totals. Also, some leagues use a 'rolling series average' that only counts your most recent, say, 10 series, to reflect current form rather than season-long performance. Always check your specific league’s rules—the USBC standard is three games, but local leagues can modify this.
Using Both Metrics Together and Handicap Considerations
For a complete picture of your bowling, you should track both. Your game average tells you your raw scoring power. Your series average tells you your reliability. A simple way to compare them is to divide your series average by the number of games in a series (usually 3). If that result is *lower* than your game average, you are inconsistent. If it is *higher*, you are remarkably steady—you rarely have a bad game, but you also might not have huge peaks. For example, if your game average is 165 and your series average is 510 (which is 170 per game), you are actually bowling better in full sessions than in isolated games. That suggests you warm up well and maintain focus. Conversely, if your series average is 450 (150 per game), you are likely having one good game and two bad ones, or vice versa. In handicap leagues, your *game average* is almost always used to compute your handicap (the pins added to your score to level the playing field). Series average is rarely used for handicapping because it is less stable and can be manipulated by intentionally bowling poorly in one game to lower your series average. Therefore, don’t confuse the two when reading your league standings—the handicap column is based on game average, not series average. In short, a game average is your mean single-game score; a series average is your mean total score for a full session. They are related but not interchangeable. The series average gives you a better sense of your endurance and consistency over a night of bowling, while the game average is your pure scoring rate. For any serious league bowler, tracking both will reveal strengths and weaknesses that a single number hides. And remember, if you are unsure how your league calculates either metric, ask your league secretary—rules vary by league and competition, and clarity is better than assumption.
Frequently Asked Questions
What is the difference between a game average and a series average?
A game average is the mean score of a single game, calculated by dividing total pins by number of games. A series average is the mean total score of a full series (typically three games), calculated by dividing total series pins by number of series. They measure different aspects: game average reflects raw scoring power, while series average reflects consistency across a session.
How do I calculate my series average?
To calculate your series average, add up the total pins from each complete series you have bowled, then divide by the number of series. For example, if you bowl three series with totals 480, 510, and 450, your series average is (480+510+450)/3 = 480.
Why do leagues use series average if game average is used for handicaps?
Leagues use series average for award qualification, team strategy, and self-assessment. It provides a measure of consistency that game average does not, helping bowlers understand their performance over a full session. Handicaps typically rely on game average because it is more stable and less prone to manipulation.
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