From BR Bullpen
- Location: Missoula, MT
- League: Pioneer League 1999-present
- Affiliation: Arizona Diamondbacks 1999-present
- Ballpark: Play Ball Park
The Missoula Osprey began play in the Pioneer League in 1999 when the Lethbridge Black Diamonds relocated to Montana. For their entire existence, the club has been an affiliate of the Arizona Diamondbacks, and they play their home games at Play Ball Park in Missoula, Montana. In their inaugural season, the Osprey captured the league championship, and in 2006, they won another crown.
In their first season, skipper Joe Almaraz led the Osprey to a league title after sweeping the Helena Brewers and Billings Mustangs in the postseason. First baseman Lyle Overbay hit .343 with 12 home runs and a league leading 101 RBIs, and catcher J.D. Closser smashed 10 homers while hitting .324. Closer Brian Matzenbacher saved 11 games while posting a 3.12 ERA out of the pen.
Under new manager Chip Hale, the Osprey posted the best overall record in their division in 2000 but did not reach the playoffs after finishing second in both halves of the season. Outfielder Victor Hall hit .307 and led the league with 47 stolen bases, and was joined on the All-Star team by Luis Terrero, who hit 8 homers.
Hale's club went 52-24 in 2001 but lost in the first round of the playoffs to the Billings Mustangs. First baseman Jesus Cota powered the offense, hitting .368 with 16 home runs and 71 RBIs. On the mound, closer Jesus Silva went 3-0 with a 2.37 ERA and led the league with 14 saves.
Jack Howell took over as manager of the Osprey in 2002, but the club missed out on the playoffs. Brandon Simon provided one of the bright spots for the team, leading the league with 30 stolen bases (despite only hitting .215). William Juárez (6-2, 2.43) was second in the league in ERA.
The Osprey missed the playoffs again in 2003, posting identical 18-20 marks in both halves of the season for manager Tony Perezchica. Starter Angel Rocha went 5-8 with a 3.13 ERA while closer Alexander Cremidan posted a 1.38 ERA and led the league with 15 saves.
With Jim Presley taking over at the helm, the Osprey struggled in 2004, finishing in last place in their division in both halves of the season. Outfielder Jaen Centeno provided one of the few bright spots, hitting .296 and making the All-Star team.
In 2006, de la Cruz led the Osprey to a second place finish in both halves of the season, before sweeping Billings and the Idaho Falls Chukars to win the league championship. Outfielder Gerardo Parra led the offense with a .328 batting average. Pitchers Anthony Barnette and Osbek Castillo tied for the league lead with 6 victories apiece. Closer Daniel Stange also paced the circuit with 13 saves.
Under new skipper Damon Mashore, the reigning champs fell to last place in both halves of the season. Second baseman Taylor Harbin and outfielder Peter Clifford each hit 10 home runs to lead the club.
 Year-by-Year Record
|Year||Record||Finish||Manager||Playoffs||Hitting coach||Pitching coach|
|1999||45-31||3rd||Joe Almaraz||League Champs|
|2000||44-32||2nd||Chip Hale||Aurelio Rodríguez|
|2001||52-24||2nd||Chip Hale||Lost in 1st round||Hector de la Cruz|
|2002||35-41||4th/3rd||Jack Howell||Hector de la Cruz||Dan Carlson|
|2003||36-40||4th/2nd (t)||Tony Perezchica|
|2004||27-46||4th/4th||Jim Presley||Wellington Cepeda|
|2005||34-42||4th/2nd||Hector de la Cruz||Mel Stottlemyre|
|2006||42-34||2nd (t)/2nd||Hector de la Cruz||League Champs||Mel Stottlemyre|
|2008||21-54||8th||Audo Vicente||Alan Zinter|
|2009||40-36||5th||Audo Vicente||Lost League Finals||Jason Hardtke|
|2010||28-47||7th||Hector de la Cruz||Jason Hardtke||Gil Heredia|
|2011||41-35||4th (t)||Hector de la Cruz||Lost in 1st round||Andy Green||Gil Heredia|
|2012||41-35||4th||Andy Green||League Champs||J.R. House||Gil Heredia|
|2013||31-42||7th||Robby Hammock||Doug Bochtler|
|2014||36-40||7th||Audo Vicente||Vince Harrison||Jeff Bajenaru|
|2015||42-33||2nd||Joe Mather||League Champs||Tack Wilson||Jeff Bajenaru|
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