| Division | Team Name | Manager | Phone |
| 2021 Coed E1 | American Legion | Jeff Morgan | 406-581-2723 |
| 2021 Coed E1 | Bomb Squad | Justin Anderson | 406-697-6181 |
| 2021 Coed E1 | Don't Close Your Eyes | Michael Garverick | 406-548-1244 |
| 2021 Coed E1 | Get Twisted | Geoff Freeman | 928-499-0799 |
| 2021 Coed E1 | Hardy Brands | Jesse Gentner | 406-570-9201 |
| 2021 Coed E1 | Interwest Tire PITT crew | Sean Herrin | 406-461-8276 |
| 2021 Coed E1 | Swingers | Evin Groves | 619-889-9903 |
| 2021 Coed E1 | The Honey Badgers - MacKenzie River Pizza & McDs | Alex Neves | 406-989-0711 |
| 2021 Coed E1 | Western CPE | Questa Edwards | 406-539-8138 |
| 2021 Coed E2 | 317/Hideaway | Jeanine Monnin | 406-581-4552 |
| 2021 Coed E2 | Baker Auto Advanced Eye Care | Karch Lockerby | 406-217-1240 |
| 2021 Coed E2 | Batter Than Average - Lexley Acres | Karl Swenson | 406-539-0277 |
| 2021 Coed E2 | Billion Auto Group | Kimberly Laufmann | 406-599-9764 |
| 2021 Coed E2 | Boats & Throws | Casey Mai | 208-717-7050 |
| 2021 Coed E2 | Bozemanos | Elyse Lesco | 979-248-6928 |
| 2021 Coed E2 | Bridger Canyon Taxidermy | Beato Nacnac | 907-315-6980 |
| 2021 Coed E2 | Budweiser/B.W.W. | Justin Anderson | 406-281-0039 |
| 2021 Coed E2 | County Assets | Erin Cox | 406-595-7578 |
| 2021 Coed E2 | Daddy's Angels | Laurie Jenkins | 860-682-0371 |
| 2021 Coed E2 | Dirty Birds | Victor Maxson | 740-541-0611 |
| 2021 Coed E2 | Divine Mercy Academy | Michael Roman | 310-570-9747 |
| 2021 Coed E2 | Dumpster Dingers | Nate DeChaine | 406-404-4895 |
| 2021 Coed E2 | East Main Ink Mingos | Jacquie Miller | 406-551-5064 |
| 2021 Coed E2 | Hardly Athletic | Jessica Arlint | 406-579-8341 |
| 2021 Coed E2 | Hustle and Flow | Taylor Winkel | 720-252-6775 |
| 2021 Coed E2 | Last Best Place Brewing | Will Thompson | 703-835-3716 |
| 2021 Coed E2 | Mailing Systems Plus More | John Theisen | 406-587-9159 |
| 2021 Coed E2 | McGlovins | Brendan Gleason | 608-444-2166 |
| 2021 Coed E2 | Murdochs Maniacs | Zach Kincaid | 303-618-2493 |
| 2021 Coed E2 | Outwest Furniture Outlaws | Bryden Buhmann | 406-853-6780 |
| 2021 Coed E2 | PCDC | Kaylynn Sheldon | 720-467-8409 |
| 2021 Coed E2 | Safeway Thundering Eggplants | Blaine Perry | 406-533-8109 |
| 2021 Coed E2 | Saved by the Balls | Brice Gagnon | 413-522-5465 |
| 2021 Coed E2 | Scott's Tots | Kyle Krenik | 406-208-7018 |
| 2021 Coed E2 | Slow Hitters | Nicole Flanagan | 406-570-0987 |
| 2021 Coed E2 | Slow Rock Jams | Mallory Thomas | 574-612-4535 |
| 2021 Coed E2 | Spectators / Morrison-Maierle / Montana Farm Bureau | Brad Mehr | 406-529-0225 |
| 2021 Coed E2 | The Benchwarmers | Connor Tweet | 406-946-2898 |
| 2021 Coed E2 | The Mighty Orcs | Michael Garverick | 406-548-1244 |
| 2021 Coed E2 | The Rustic Cup | Ashley Davis | 406-223-2142 |
| 2021 Coed E2 | The Unknowns | Doug Posdon | 406-599-5055 |
| 2021 Coed E2 | Tkjams Rams | Tomas Tomas | 406-461-9437 |
| 2021 Coed E2 | Triple B | Austin Duval | 406-209-1517 |
| 2021 Coed E2 | Venture Church | Kayla Powell | 262-358-2351 |
| 2021 Coed E2 | YC Misfits | Rebecca LaSalle | 406-539-1939 |
| 2021 Coed E3 | Alcoballics | Nolan McNamara | 208-570-5342 |
| 2021 Coed E3 | Best Practice Medicine | Frances Graham | 406-599-1264 |
| 2021 Coed E3 | Black Gold Hair Design | Kacie Ramus | 406-489-0596 |
| 2021 Coed E3 | Cat's Paw | Rachel Berg | 406-350-2333 |
| 2021 Coed E3 | ChemGrad Radicals | Hunter Fausset | 719-205-4007 |
| 2021 Coed E3 | DILLIGAF | Sarah Burk | 406-548-2475 |
| 2021 Coed E3 | Door Tech | Drew Burkenpas | 406-600-4911 |
| 2021 Coed E3 | Energy 1 | ||
| 2021 Coed E3 | No hitters and no chasers | Reilly McNaught | 612-508-6322 |
| 2021 Coed E3 | Son's 'a Pitches | Alex Johnson | 406-600-0450 |
| 2021 Coed E3 | The Pancake Batters | Adam Tucker | 406-548-6972 |
| 2021 Coed E3 | Tummy Troubles | Nolan McNamara | 208-570-5342 |
| 2021 Men's C/D | 4 Ever 1 | Brian Taylor | 4065-99-7081 |
| 2021 Men's C/D | Aaron Limberg | Aaron Limberg | 507-269-7751 |
| 2021 Men's C/D | BD Construction/Seven sushi | Dakota Robinson | 406-599-2469 |
| 2021 Men's C/D | CompuSource | Jim Hageman | 406-539-5270 |
| 2021 Men's C/D | Farmers | LD Severson | 406-57-02331 |
| 2021 Men's C/D | Hitmen | Geoff Freeman | 928-499-0799 |
| 2021 Men's C/D | Play It Again Sports - Beaverslide | Patrick Sherrill | 406-581-4850 |
| 2021 Men's C/D | Purple Haze | Ben Jackson | 907-947-4770 |
| 2021 Men's C/D | Spectators/The Ridge | Alex Ekstrom | 406-209-1850 |
| 2021 Men's C/D | Thirsty Turtles | Maxwell Lundgren | 619-782-3199 |
| 2021 Men's C/D | Valley Credit Union | Nicholas Scarson | 406-451-4873 |
| 2021 Men's E | Anti-Bunters | Mike Kaiser | 406-214-8852 |
| 2021 Men's E | Bozeman Fire L613 | Brian Rudge | 412-996-4410 |
| 2021 Men's E | Bozeman Lobsters | Alex Nash | 978-500-8864 |
| 2021 Men's E | Bridger Bowmen | Mike Cligan | 717-870-8788 |
| 2021 Men's E | Ewe Crushers | Andrew Whitney | 406-223-6702 |
| 2021 Men's E | Hart Real Estate Solutions | Tim Hart | 406-570-5730 |
| 2021 Men's E | Kenyon Noble Ducks | Ryan Russell | 707-363-6449 |
| 2021 Men's E | Langlas | Josh Henigman | 406-580-0341 |
| 2021 Men's E | Montana Jane's Blazers | Nick Barney | 406-595-2055 |
| 2021 Men's E | Outkasts | John Fitch | 406-580-3941 |
| 2021 Men's E | Pour House Lockdowns | Derek Casanovas | 907-830-1066 |
| 2021 Men's E | Pyramid Pharaohs | Kurt Kaiser | 609-668-0764 |
| 2021 Men's E | Schlubs | Jared Leonard | 406-208-5578 |
| 2021 Men's E | Straight Gassed | Troy Mossing | 406-600-1020 |
| 2021 Men's E | The Pour House Son's of Pitches | Alex Neves | 406-989-0711 |
| 2021 Men's E | Thunderbirds | Jeff Morgan | 406-581-2723 |
| 2021 Men's E | Walk-Ins | Dennis Johnson | 406-599-8419 |
| 2021 Men's E | WildRye Distilling/Off Contantly | Alan Edmondson | 406-600-4358 |
| 2021 Men's E | Yankmees | Toby Milow | 763-257-3434 |
| 2021 Men's Masters | Colombos/Karl Marks | Gaylen Black | 406-581-1969 |
| 2021 Women's | Dirty Dozen | Hannah Gee | 406-581-3829 |
| 2021 Women's | Sassquatches | Brittany Trushel | 406-560-6909 |
| 2021 Women's | Sluggin Mamas | Jessica Flores | 406-223-9764 |
| 2021 Women's | The Betties | Caelah Gardenier | 406-579-9757 |
| 2021 Women's | Ice Cold Pitches | Mandy Potter | 740-541-0611 |
| 2021 Women's | Free Agents |
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