|No. of teams||8 (10 in 2022)|
|Country||United States of America|
|Missoula PaddleHeads (2021)|
|Most titles||Billings Mustangs (15)|
The Pioneer League is an independent baseball league that operates in the Rocky Mountain region of the United States. Its teams are not directly affiliated with Major League Baseball (MLB). It is designated as an MLB Partner League.
From 1939 to 2020, the Pioneer League was affiliated with Minor League Baseball and its teams were affiliated with MLB teams. It operated as a Class C league from 1939 to 1942 and from 1946 to 1962. It was elevated to Class A for 1963 and was a Rookie-level league from 1964 to 2020.
The Pioneer League began in 1939 with six teams in Idaho and Utah, operating at the Class C level. The original six teams were the Boise Pilots, Lewiston Indians, Ogden Reds, Pocatello Cardinals, Salt Lake City Bees, and Twin Falls Cowboys. With players in short supply due to World War II, the league suspended operations for the 1943 through 1945 seasons.
In 1948, the league expanded by adding two teams in Montana; the Billings Mustangs and Great Falls Electrics. In these early years, teams in the league either operated independently or were affiliated with Major League Baseball (MLB) or Pacific Coast League (PCL) parent clubs, as the PCL was attempting to grow (but ultimately failed) into a major league. When MLB's Los Angeles Dodgers displaced the PCL's Hollywood Stars in 1958, the Stars relocated and became the "new" Salt Lake City Bees, remaining in the PCL and taking away the Pioneer League's largest market.
By 1959, the Pioneer League was down to six teams; Billings and Great Falls along with the Boise Braves, Idaho Falls Russets, Missoula Timberjacks, and Pocatello Athletics. The league operated at the Class A level for one year (1963), before changing to Rookie league in 1964, when there were only four teams in the league; the Idaho Falls Angels, Magic Valley Cowboys, Pocatello Chiefs, and Treasure Valley Cubs. By 1978, the league had again grown to eight teams — Billings and Idaho Falls along with the Butte Copper Kings, Calgary Cardinals, Great Falls Giants, Helena Phillies, Lethbridge Dodgers, and Medicine Hat Blue Jays. With the exception of 1986 (when there were six teams), there have been eight teams in the league since then.
In 2016, total league attendance was 616,686, down slightly from the 2015 total of 633,622.
After the 2018 season, the Helena Brewers relocated to Colorado Springs, Colorado, where they now play as the Rocky Mountain Vibes.
As the start of the 2020 season was postponed due to the COVID-19 pandemic before being cancelled on June 30, making the 2019 season the league's last as an MLB-affiliated league of Minor League Baseball.
In conjunction with the contraction of Minor League Baseball in 2021, the Pioneer League was converted to an independent baseball league and was granted status as an MLB Partner League. The reconfigured league continued with the same franchises using the same identities, with the exception of the Orem Owlz who relocated to Windsor, Colorado, as the Northern Colorado Owlz. The Boise Hawks also joined the Pioneer League in 2021 after moving from the Northwest League.
|Northern||Billings Mustangs||1948||Billings, Montana||Dehler Park||5,000|
|Great Falls Voyagers||1948||Great Falls, Montana||Centene Stadium||2,500|
|Idaho Falls Chukars||1940||Idaho Falls, Idaho||Melaleuca Field||3,400|
|Missoula PaddleHeads||1999||Missoula, Montana||Ogren Park at Allegiance Field||3,500|
|Southern||Boise Hawks||1987||2021||Boise, Idaho||Memorial Stadium||3,452|
|Grand Junction Rockies||1978||Grand Junction, Colorado||Suplizio Field||7,014|
|Ogden Raptors||1994||Ogden, Utah||Lindquist Field||8,262|
|Rocky Mountain Vibes||2019||Colorado Springs, Colorado||UCHealth Park||8,500|
|Northern Colorado Owlz||2001||2022||Windsor, Colorado||Future Legends Complex||6,000|
|Flathead Valley||2021||2022||Kalispell, Montana||Ridge Run Field||2,500|
Main article: Pioneer Baseball League rosters
Bold text indicates active teams.
|Teams by city|
|City, State or Province||Team(s)||Years||Seasons|
|Billings, Montana||Mustangs||1948–1963, 1969–present||67|
|Boise, Idaho||Braves, Hawks, Pilots, Yankees||1939–1942, 1946–1963, from 2021||22|
|Butte, Montana||Copper Kings||1978–1985, 1987–2000||22|
|Caldwell, Idaho||Cubs, Treasure Valley Cubs||1964–1971||8|
|Calgary, Alberta||Cardinals, Expos||1977–1984||8|
|Colorado Springs, Colorado||Vibes||2019–present||1|
|Great Falls, Montana||Dodgers, Electrics, Giants, Selectrics, Voyagers, White Sox||1948–1963, 1969–present||67|
|Grand Junction, Colorado||Rockies||2012–present||8|
|Helena, Montana||Brewers, Gold Sox, Phillies||1978–2000, 2003–2018||29|
|Idaho Falls, Idaho||A's, Angels, Braves, Chukars, Gems, Nuggets, Padres, Russets, Yankees||1940–1942, 1946–present||77|
|Lethbridge, Alberta||Black Diamonds, Dodgers, Expos, Mounties||1975–1998||24|
|Medicine Hat, Alberta||A's, Blue Jays||1977–2002||26|
|Missoula, Montana||Osprey, PaddleHeads, Timberjacks||1956–1960, 1999–2019, 2020–present||26|
|Ogden, Utah||Dodgers, Raptors, Reds, Spikers||1939–1942, 1946–1955, 1966–1974, 1994–present||49|
|Pocatello, Idaho||A's, Bannocks, Cardinals, Chiefs, Gems, Giants, Pioneers, Gate City Pioneers, Posse||1939–1942, 1946–1965, 1984–1985, 1987–1991, 1993||32|
|Salt Lake City, Utah||Bees, Giants, Trappers||1939–1942, 1946–1957, 1967–1969, 1985–1992||27|
|Twin Falls, Idaho||Cowboys, Magic Valley Cowboys||1939–1942, 1946–1957, 1961–1966, 1968–1971||36|
|Windsor, Colorado||Owlz||from 2022||0|
James R. McCurdy is the current president of the Pioneer Baseball League. McCurdy received his BBA from the University of Houston in 1970 and his JD from the University of Texas School of Law in 1974. He mediated the restructure of Minor League Baseball's governing structure in 1992 and was an inaugural member of the MiLB board of trustees from 1992 to 1994. In 1993, he was appointed by the president of MiLB to serve on the Professional Baseball Executive Council. McCurdy was elevated to the position of league president in 1994, replacing Ralph Nelles who was the president from 1975 to 1993. McCurdy also teaches sports law courses at Gonzaga University School of Law and the University of San Diego School of Law. His publications include: Sports Law: Cases & Materials (with Ray Yasser, C. Peter Goplerud, and Maureen Weston) (7th ed. LexisNexis 2011), Thunder on the Road from Seattle to Oklahoma City: Going from NOPA to ZOPA in the NBA, in Legal Issues in American Basketball ch. IV (Lewis Kurlantzick ed., Academica Press 2011), and, The Fundamental Nature of Professional Sports Leagues, Constituent Clubs, & Mutual Duties to Protect Market Opportunities: Organized Baseball Case Study, in Legal Issues in Professional Baseball ch. IV (Lewis Kurlantzick ed., Academica Press 2005).
Main article: List of Pioneer League champions
League champions have been determined by different means since the Pioneer League's formation in 1939. There were postseason playoffs when the league operated as Class C (1939–1962), except for 1939 and 1956, and for the three years during World War II when the league did not operate. In the league's one year as Class A (1963), there were also postseason playoffs. After becoming a Rookie league in 1964, the league champions were simply the regular season pennant winners through 1977. Since 1978, postseason playoffs have again been held to determine a league champion.