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Historical list of Pioneer League teams per year with MLB affiliate listed in ()
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Pioneer League (Rk) League History

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YearTM CountChampionsList of Teams
20208---Billings Mustangs (CIN), Grand Junction Rockies (COL), Great Falls Voyagers (CHA), Idaho Falls Chukars (KCA), Missoula PaddleHeads (ARI), Ogden Raptors (LAN), Orem Owlz (ANA), Rocky Mountain Vibes (MIL)
20198Idaho Falls ChukarsBillings Mustangs (CIN), Grand Junction Rockies (COL), Great Falls Voyagers (CHA), Idaho Falls Chukars (KCA), Missoula Osprey (ARI), Ogden Raptors (LAN), Orem Owlz (ANA), Rocky Mountain Vibes (MIL)
20188Great Falls VoyagersBillings Mustangs (CIN), Grand Junction Rockies (COL), Great Falls Voyagers (CHA), Helena Brewers (MIL), Idaho Falls Chukars (KCA), Missoula Osprey (ARI), Ogden Raptors (LAN), Orem Owlz (ANA)
20178Ogden RaptorsBillings Mustangs (CIN), Grand Junction Rockies (COL), Great Falls Voyagers (CHA), Helena Brewers (MIL), Idaho Falls Chukars (KCA), Missoula Osprey (ARI), Ogden Raptors (LAN), Orem Owlz (ANA)
20168Orem OwlzBillings Mustangs (CIN), Grand Junction Rockies (COL), Great Falls Voyagers (CHA), Helena Brewers (MIL), Idaho Falls Chukars (KCA), Missoula Osprey (ARI), Ogden Raptors (LAN), Orem Owlz (ANA)
20158Missoula OspreyBillings Mustangs (CIN), Grand Junction Rockies (COL), Great Falls Voyagers (CHA), Helena Brewers (MIL), Idaho Falls Chukars (KCA), Missoula Osprey (ARI), Ogden Raptors (LAN), Orem Owlz (ANA)
20148Billings MustangsBillings Mustangs (CIN), Grand Junction Rockies (COL), Great Falls Voyagers (CHA), Helena Brewers (MIL), Idaho Falls Chukars (KCA), Missoula Osprey (ARI), Ogden Raptors (LAN), Orem Owlz (ANA)
20138Idaho Falls ChukarsBillings Mustangs (CIN), Grand Junction Rockies (COL), Great Falls Voyagers (CHA), Helena Brewers (MIL), Idaho Falls Chukars (KCA), Missoula Osprey (ARI), Ogden Raptors (LAN), Orem Owlz (ANA)
20128Missoula OspreyBillings Mustangs (CIN), Grand Junction Rockies (COL), Great Falls Voyagers (CHA), Helena Brewers (MIL), Idaho Falls Chukars (KCA), Missoula Osprey (ARI), Ogden Raptors (LAN), Orem Owlz (ANA)
20118Great Falls VoyagersBillings Mustangs (CIN), Casper Ghosts (COL), Great Falls Voyagers (CHA), Helena Brewers (MIL), Idaho Falls Chukars (KCA), Missoula Osprey (ARI), Ogden Raptors (LAN), Orem Owlz (ANA)
20108Helena BrewersBillings Mustangs (CIN), Casper Ghosts (COL), Great Falls Voyagers (CHA), Helena Brewers (MIL), Idaho Falls Chukars (KCA), Missoula Osprey (ARI), Ogden Raptors (LAN), Orem Owlz (ANA)
20098Orem OwlzBillings Mustangs (CIN), Casper Ghosts (COL), Great Falls Voyagers (CHA), Helena Brewers (MIL), Idaho Falls Chukars (KCA), Missoula Osprey (ARI), Ogden Raptors (LAN), Orem Owlz (ANA)
20088Great Falls VoyagersBillings Mustangs (CIN), Casper Ghosts (COL), Great Falls Voyagers (CHA), Helena Brewers (MIL), Idaho Falls Chukars (KCA), Missoula Osprey (ARI), Ogden Raptors (LAN), Orem Owlz (ANA)
20078Orem OwlzBillings Mustangs (CIN), Casper Ghosts (COL), Great Falls White Sox (CHA), Helena Brewers (MIL), Idaho Falls Chukars (KCA), Missoula Osprey (ARI), Ogden Raptors (LAN), Orem Owlz (ANA)
20068Missoula OspreyBillings Mustangs (CIN), Casper Rockies (COL), Great Falls White Sox (CHA), Helena Brewers (MIL), Idaho Falls Chukars (KCA), Missoula Osprey (ARI), Ogden Raptors (LAN), Orem Owlz (ANA)
20058Orem OwlzBillings Mustangs (CIN), Casper Rockies (COL), Great Falls White Sox (CHA), Helena Brewers (MIL), Idaho Falls Chukars (KCA), Missoula Osprey (ARI), Ogden Raptors (LAN), Orem Owlz (ANA)
20048Provo AngelsBillings Mustangs (CIN), Casper Rockies (COL), Great Falls White Sox (CHA), Helena Brewers (MIL), Idaho Falls Chukars (KCA), Missoula Osprey (ARI), Ogden Raptors (LAN), Provo Angels (ANA)
20038Billings MustangsBillings Mustangs (CIN), Casper Rockies (COL), Great Falls White Sox (CHA), Helena Brewers (MIL), Idaho Falls Padres (SDN), Missoula Osprey (ARI), Ogden Raptors (LAN), Provo Angels (ANA)
20028Great Falls DodgersBillings Mustangs (CIN), Casper Rockies (COL), Great Falls Dodgers (LAN), Idaho Falls Padres (SDN), Medicine Hat Blue Jays (TOR), Missoula Osprey (ARI), Ogden Raptors (MIL), Provo Angels (ANA)
20018Billings MustangsBillings Mustangs (CIN), Casper Rockies (COL), Great Falls Dodgers (LAN), Idaho Falls Padres (SDN), Medicine Hat Blue Jays (TOR), Missoula Osprey (ARI), Ogden Raptors (MIL), Provo Angels (ANA)
YearTM CountChampionsList of Teams
20008Idaho Falls PadresBillings Mustangs (CIN), Butte Copper Kings (ANA), Great Falls Dodgers (LAN), Helena Raptors (MIL), Idaho Falls Padres (SDN), Medicine Hat Blue Jays (TOR), Missoula Osprey (ARI), Ogden Raptors (MIL)
19998Missoula OspreyBillings Mustangs (CIN), Butte Copper Kings (ANA), Great Falls Dodgers (LAN), Helena Brewers (MIL), Idaho Falls Braves (SDN), Medicine Hat Blue Jays (TOR), Missoula Osprey (ARI), Ogden Raptors (MIL)
19988Idaho Falls BravesBillings Mustangs (CIN), Butte Copper Kings (ANA), Great Falls Dodgers (LAN), Helena Brewers (MIL), Idaho Falls Braves (SDN), Lethbridge Black Diamonds (ARI), Medicine Hat Blue Jays (TOR), Ogden Raptors (MIL)
19978Billings MustangsBillings Mustangs (CIN), Butte Copper Kings (ANA), Great Falls Dodgers (LAN), Helena Brewers (MIL), Idaho Falls Braves (SDN), Lethbridge Black Diamonds (ARI), Medicine Hat Blue Jays (TOR), Ogden Raptors (MIL)
19968Helena BrewersBillings Mustangs (CIN), Butte Copper Kings (TBA), Great Falls Dodgers (LAN), Helena Brewers (MIL), Idaho Falls Braves (SDN), Lethbridge Black Diamonds (ARI), Medicine Hat Blue Jays (TOR), Ogden Raptors (MIL)
19958Helena BrewersBillings Mustangs (CIN), Butte Copper Kings (), Great Falls Dodgers (LAN), Helena Brewers (MIL), Idaho Falls Braves (SDN), Lethbridge Mounties (), Medicine Hat Blue Jays (TOR), Ogden Raptors ()
19948Billings MustangsBillings Mustangs (CIN), Butte Copper Kings (), Great Falls Dodgers (LAN), Helena Brewers (MIL), Idaho Falls Braves (ATL), Lethbridge Mounties (), Medicine Hat Blue Jays (TOR), Ogden Raptors ()
19938Billings MustangsBillings Mustangs (CIN), Butte Copper Kings (), Great Falls Dodgers (LAN), Helena Brewers (MIL), Idaho Falls Braves (ATL), Lethbridge Mounties (), Medicine Hat Blue Jays (TOR), Pocatello Posse ()
19928Billings MustangsBillings Mustangs (CIN), Butte Copper Kings (TEX), Great Falls Dodgers (LAN), Helena Brewers (MIL), Idaho Falls Gems (ATL), Lethbridge Mounties (), Medicine Hat Blue Jays (TOR), Salt Lake City Trappers ()
19918Salt Lake City TrappersBillings Mustangs (CIN), Butte Copper Kings (TEX), Great Falls Dodgers (LAN), Helena Brewers (MIL), Idaho Falls Braves (ATL), Medicine Hat Blue Jays (TOR), Pocatello Pioneers (), Salt Lake City Trappers ()
19908Great Falls DodgersBillings Mustangs (CIN), Butte Copper Kings (TEX), Gate City Pioneers (), Great Falls Dodgers (LAN), Helena Brewers (MIL), Idaho Falls Braves (ATL), Medicine Hat Blue Jays (TOR), Salt Lake City Trappers ()
19898Great Falls DodgersBillings Mustangs (CIN), Butte Copper Kings (TEX), Great Falls Dodgers (LAN), Helena Brewers (MIL), Idaho Falls Braves (ATL), Medicine Hat Blue Jays (TOR), Pocatello Giants (SFN), Salt Lake City Trappers ()
19888Great Falls DodgersBillings Mustangs (CIN), Butte Copper Kings (TEX), Great Falls Dodgers (LAN), Helena Brewers (MIL), Idaho Falls Braves (ATL), Medicine Hat Blue Jays (TOR), Pocatello Giants (SFN), Salt Lake City Trappers ()
19878Salt Lake City TrappersBillings Mustangs (CIN), Butte Copper Kings (), Great Falls Dodgers (LAN), Helena Brewers (MIL), Idaho Falls Braves (ATL), Medicine Hat Blue Jays (TOR), Pocatello Giants (SFN), Salt Lake City Trappers ()
19866Salt Lake City TrappersBillings Mustangs (CIN), Great Falls Dodgers (LAN), Helena Gold Sox (MIL), Idaho Falls Braves (ATL), Medicine Hat Blue Jays (TOR), Salt Lake City Trappers ()
19858Salt Lake City TrappersBillings Mustangs (CIN), Butte Copper Kings (), Great Falls Dodgers (LAN), Helena Gold Sox (MIL), Idaho Falls Nuggets (), Medicine Hat Blue Jays (TOR), Pocatello Gems (OAK), Salt Lake City Trappers ()
19848Helena Gold SoxBillings Mustangs (CIN), Butte Copper Kings (SEA), Calgary Expos (MON), Great Falls Dodgers (LAN), Helena Gold Sox (), Idaho Falls A's (OAK), Medicine Hat Blue Jays (TOR), Pocatello Gems ()
19838Billings MustangsBillings Mustangs (CIN), Butte Copper Kings (KCA), Calgary Expos (MON), Great Falls Giants (SFN), Helena Phillies (PHI), Idaho Falls A's (OAK), Lethbridge Dodgers (LAN), Medicine Hat Blue Jays (TOR)
19828Medicine Hat Blue JaysBillings Mustangs (CIN), Butte Copper Kings (KCA), Calgary Expos (MON), Great Falls Giants (SFN), Helena Phillies (PHI), Idaho Falls A's (OAK), Lethbridge Dodgers (LAN), Medicine Hat Blue Jays (TOR)
19818Butte Copper KingsBillings Mustangs (CIN), Butte Copper Kings (MIL), Calgary Expos (MON), Great Falls Giants (SFN), Helena Phillies (PHI), Idaho Falls Angels (CAL), Lethbridge Dodgers (LAN), Medicine Hat Blue Jays (TOR)
YearTM CountChampionsList of Teams
19808Lethbridge DodgersBillings Mustangs (CIN), Butte Copper Kings (MIL), Calgary Expos (MON), Great Falls Giants (SFN), Helena Phillies (PHI), Idaho Falls Angels (CAL), Lethbridge Dodgers (LAN), Medicine Hat Blue Jays (TOR)
19798Lethbridge DodgersBillings Mustangs (CIN), Butte Copper Kings (MIL), Calgary Expos (MON), Great Falls Giants (SFN), Helena Phillies (PHI), Idaho Falls Angels (CAL), Lethbridge Dodgers (LAN), Medicine Hat Blue Jays (TOR)
19788Billings MustangsBillings Mustangs (CIN), Butte Copper Kings (), Calgary Cardinals (SLN), Great Falls Giants (SFN), Helena Phillies (PHI), Idaho Falls Angels (CAL), Lethbridge Dodgers (LAN), Medicine Hat Blue Jays (TOR)
19776---Billings Mustangs (CIN), Calgary Cardinals (SLN), Great Falls Giants (SFN), Idaho Falls Angels (CAL), Lethbridge Dodgers (LAN), Medicine Hat A's (OAK)
44 record(s)