Evolution of Boston Celtics logo

During a Bulls @ Celtics game, the broadcast showed some type of museum or memorial where a shamrock was presented as the team’s logo. Maybe it was because I was deep in the research process for the 2025 “In Art” blog, but that second when the old logo appeared sent me into a spiral, thinking about how it went from that sketchy shamrock to the somewhat minimalistic leprechaun of today. That spiral ended in the very article you’re reading.

The first logo (1946–1950)

There’s no artist documented behind the original shamrock; it’s possible it was a simple artwork commissioned by founder Walter Brown. With the team name and the concept of representing the city’s Irish-American community already defined, the logo represented it successfully. It was the 1940s — World War II dominated American culture at the time. While movements like Abstract Expressionism were emerging in the art world, and Swiss Design (the International Typographic Style) was taking hold in Europe, the American graphic design landscape was in a transitional phase, moving from illustrative, traditional styles toward the clean, minimalist principles that would define the mid-century modern era. The first Celtics logo was clearly influenced by wartime propaganda — bold lettering and the printing technology of the era account for its lack of detail and flat coloring. Fittingly, it matched the team’s ability at the time: the Celtics played in the BAA (Basketball Association of America) before the 1949 merger created the NBA, and in their first four seasons they held losing records every year, making the playoffs only twice. The Boston Celtics wouldn’t become a basketball powerhouse until the arrival of legendary coach Red Auerbach, who coached the team for 16 years and ended his tenure with a .667 win rate and 9 NBA titles. Red’s influence brings us to the now-famous leprechaun.

Lucky the Leprechaun (1950–1960)

The character was created by Zang Auerbach, brother of the coach. The war was over, and American design was moving away from the bold lettering and colors of propaganda toward the International Typographic Style, which emphasized objectivity and clarity. The mascot marked a move toward a more modern visual identity, reflecting the current state of American consumer culture. Lucky the Leprechaun is still a fundamental part of the Boston Celtics’ identity today, and it’s fitting that he was created during the franchise’s foundational era. After the struggling early years, the 1950s established Boston as a basketball powerhouse, starting with the hiring of Auerbach, who led a decade that saw the rise and peak of a dynasty — their first title in 1957, followed by the Bill Russell era and its championships (1957, 1959, 1960, 1961, 1962, 1963, 1964, 1965, 1966, 1968, 1969). Society and technology evolved quickly during the decade, which led to some unusual adaptations, like the orange background added to the logo around the early-to-mid 1960s, echoing the pop art and psychedelic influences of the time.

The first round Boston Celtics logo (1968–1974)

After the sketchy version, the character version, and the art-inspired version came the “now we’re a business” version. In the late 1960s, NBA teams entered a more professional era, and logos began taking on rounder shapes that were easier to scale from jerseys to center courts. The Celtics entered a rebuilding era after the Bill Russell years, ready to consolidate their identity around the leprechaun character and Irish references. Technology again played a role, reinforcing a darker background with white accents for better display and print reproduction.

The classic Boston one (1974–1996)

The maturing process of establishing the team as a “business” culminated in the 1980s with the Larry Bird–Magic Johnson rivalry, as teams worked to scale their brands worldwide. The minimalist movement dominating design at the time shows in the elimination of clutter and a coherent color scheme. This is the foundation of everything we know today — the Celtics identity we recognize now was defined under this logo.

The current one (1996–present)

Finally, for the franchise’s 50th anniversary, Lucky the Leprechaun entered its internet-era refinement, with added details and color nuances built to display well on screens of any size and print well on any surface — arriving alongside more titles and great teams, including the Big Three era and the most recent championship in 2024.