Introduction of the Three-Point Line

The three-point line has a richer history than you might expect. It was first tested in a 1945 college game between Columbia and Fordham, long before it became a professional staple. The American Basketball League officially adopted it in 1961, and the NBA didn't follow until 1979, when Chris Ford hit the first official three-pointer. Early adoption was slow, with teams averaging just 2.8 attempts per game. There's plenty more to discover about how this rule transformed the game.

Key Takeaways

• The three-point line was first tested in a 1945 college game between Columbia and Fordham to reduce taller players' dominance.
• The American Basketball League became the first professional league to formally implement the three-point line in 1961.
• The NBA introduced the three-point line during the 1979-80 season, coinciding with the debuts of Larry Bird and Magic Johnson.
• Chris Ford of the Boston Celtics made the first official NBA three-pointer on October 12, 1979.
• Initially, teams averaged only 2.8 three-point attempts per game, reflecting widespread skepticism from coaches toward the new rule.

The Three-Point Line Actually Started in the 1940s

The three-point line didn't begin with the NBA — it actually traces back to a 1945 college game between Columbia and Fordham, where organizers drew a line 21 feet from the hoop to test whether long-distance shots could change the game. Columbia won 73-58, proving the concept had potential.

Behind Hobson's three-point experiments was Howard Hobson, a Columbia doctoral student who'd studied basketball across 13 seasons. His goal was simple: make long-range shots viable and reduce taller players' dominance near the basket.

Despite the excitement these early college tests generated, the rule wasn't permanently adopted after 1945. A second test followed in 1958, then another in 1961 — but it still took decades before the three-pointer became a standard part of the game. It wasn't until 1961 that the American Basketball League formally implemented the three-point line as an official rule. The NBA wouldn't introduce its own three-point line until the 1979-80 season, with Chris Ford earning the distinction of making the first official three-pointer in league history.

How Professional Leagues First Adopted the Three-Point Line

While college courts were testing the concept, professional leagues were already racing to make the three-point line a permanent fixture. The American Basketball League made history in 1961 by implementing a 25-foot arc league-wide, becoming the first professional league to adopt the shot permanently. Unfortunately, the ABL folded after just 1.5 seasons.

Two years later, the Continental Basketball Association followed suit in 1963. Then the American Basketball Association debuted its three-point line during the 1967-68 season, pairing it with the slam dunk to attract fans. Commissioner George Mikan championed the rule, recognizing its impact on roster construction and strategy and gameplay by giving smaller players a scoring advantage and forcing defenses to spread out, ultimately reshaping how teams approached the professional game. At the high school level, the National Federation officially adopted the three-point line in 1987, making it a nationwide rule for the 1987-1988 season.

Following the ABA's folding in 1976, the NBA implemented the three-point line on a trial basis for the 1979-1980 season, marking a pivotal moment in the shot's journey to mainstream professional basketball.

The NBA Finally Added the Three-Point Line in 1979

After the ABA-NBA merger in 1976, the NBA surprisingly excluded the three-point line from the unified league's ruleset, leaving fans of the long-range shot waiting three more years.

The NBA's 1979 season debut changed everything, coinciding with two landmark rookie star debuts — Larry Bird and Magic Johnson.

Here's what made it significant:

1. Chris Ford of the Boston Celtics hit the first official three-pointer on October 12, 1979, against the Houston Rockets.
2. Teams averaged only 2.8 attempts per game, reflecting widespread coach skepticism.
3. The arc measured 23 feet 9 inches at its peak, shortened to 22 feet in corners.

Despite initial resistance, this trial implementation quietly laid the foundation for basketball's modern offensive revolution. The three-point line was not an entirely new concept, as the American Basketball Association had already embraced it a full decade earlier in 1967 to distinguish itself from the NBA. Over time, coaches and players alike grew more comfortable with the shot, as 3-point attempts per game have increased significantly across the league since its adoption.

Why Did So Many Teams Ignore the Three-Point Line at First?

Despite finally having the three-point line in 1979, most NBA teams barely touched it. You'd see teams averaging just 2.8 attempts per game that first season, which tells you everything about how seriously they took it.

Player/coach skepticism ran deep. Influential coaches like Dick Motta called it an ABA gimmick and actively instructed their players to drive to the basket instead. Nobody consulted coaches before implementing the rule, which only fueled their resistance.

The lack of analytical support made things worse. Teams had no data proving the shot's efficiency value, so they stuck with traditional inside scoring. College basketball wasn't using it either, meaning players arrived in the NBA without three-point experience or training. That combination of distrust and unfamiliarity kept adoption painfully slow for years. It would take pioneers like Bird and Miller to eventually demonstrate the shot's true potential and begin shifting perceptions across the league.

How the NBA's Three-Point Distance Has Changed Over Time

The NBA's three-point line hasn't always sat at the same distance, and the league has moved it twice since its 1979-80 debut.

From 1994–97, the NBA tried uniform distance experiments, shrinking the entire arc to 22 feet. Three-point percentage trends shifted drastically during this period:

1. Attempts jumped from 9.9 to 15.3 per game after the 1994 shortening.
2. Shooting percentages peaked higher in 1996 due to the shorter line.
3. The league restored original distances in 1997-98: 23 feet 9 inches at the top, 22 feet in corners.

Since returning to original distances, three-point percentage trends have stabilized between 35–37%. You can see how even a few inches considerably impacts how players and teams approach long-range shooting strategy. Before the NBA even adopted the three-point line, the American Basketball League was the first professional league to institute the rule back in 1961. The ABA later merged with the NBA in 1976, though the three-point shot was not immediately included as part of that merger agreement.

How the Three-Point Line Reshaped NBA Offense and Scoring Records

Restoring the three-point line to its original distances in 1997-98 didn't just settle a debate about arc placement — it set the stage for one of the most dramatic offensive overhauls in NBA history. Three-point attempts jumped from 22.2% of all shots in 2010-11 to 39.2% by 2020-21, while the impact on shooting efficiency remained steady, stabilizing near 35%-36%.

You'd think more threes would translate to more wins, but the correlation with team success tells a nuanced story. Teams attempting the most threes won just 52% of games from 2004-2019. What actually predicts winning isn't volume — it's efficiency. Higher three-point percentages show a stronger R²=0.5091 relationship with offensive rating, proving perimeter accuracy matters far more than simply launching more attempts. The Golden State Warriors demonstrated this principle most visibly, revolutionizing the game through their emphasis on three-point shooting and inspiring other teams to attempt to replicate their model.

With players shooting 36% on 3s, the typical attempt produces 1.07 points per shot, making it a more efficient option than most mid-range two-point attempts taken outside the paint.