Without officials, it is just recess



Hammer Sports LLC is a sports assigning business. Heidi, Hammer Sports owner, assigns referees OR umpires for games throughout the state of Minnesota, most being in the metro area.

Sports Assigned & Levels

Hammer Sports assigns referees and umpires for baseball, basketball, fastpitch, football, slowpitch softball, soccer, and volleyball. The levels assigned vary, but include youth, middle school, high school, and adult.

Invoicing and Payroll

Hammer Sports pays their officials. Schools/contacts do not have to worry or deal with payment vouchers or W9s with officials assigned by Hammer Sports. We do all the dirty work so to speak.

Every Sunday evening, Donna Hunt, Hammer Sports assistant (charge of invoice/payroll), will email an Arbiter invoice to schools/contacts for all games assigned the previous week. She then pays officials 24 hours later with Bill Pay. We don’t wait to get paid before compensating officials. This keeps them happy.

Hammer Sports will send all schools/contacts a W9 to keep for tax purposes. When you receive an emailed invoice, we appreciate a timely payment. Please make the check payable to Hammer Sports, mail to: 9162 Kaeding Ave NE, Ostego MN, 55362. You would have to provide just a 1099 to Hammer Sports if the $600 mark is met each year.


Hammer Sports assigns all games using Arbiter (www1.arbitersports.com), which is an online assigning website. Schools/contacts will have access to see their schedule on their Arbiter account. The games will have all the details (date, time, level, sport, location, teams, AD contact info, officials contact info, etc).

Arbiter also will issue a 1099 for Hammer Sports at the end of the year for officials who made over $600 to print off in their account. Schools/contacts that request officials to be assigned by Hammer Sports will NOT be responsible for 1099s for officials or any paperwork (payment vouchers/W9). For questions about Arbiter, call their customer service hotline at 801-576-9436.

Frequent Questions
What is the cost to have officials assigned to work games?

The cost varies by sport, level, etc. Heidi will work with you and give comparison rates what others are paying to ensure you are getting a fair price. The assigning fee is included in the game fee, there is no additional charge added.

What is the level of experience of your officials?

The level of experience is a broad range. I have new referees, veterans, high school, varsity, and a handful of college officials that work games for Hammer Sports. It’s important to keep training and recruiting new officials because every year there are officials who move, retire, etc. Heidi (assigner) does her very best to have new refs work with those with experience. For certain higher level games, only experienced officials are used.

Do you assign scorekeepers?

Yes, Hammer Sports is willing to assign scorekeepers.

What if I think the invoice is wrong?

Mistakes can happen. If you have a question in regards to an invoice received, contact Donna Hunt, Hammer Sports payroll assistant, huntdonna@outlook.com.

Can I request certain officials to work OR to not work our games? Can I provide feedback about an official’s performance?

Absolutely! I want you to be happy with who works your games. Plus, Heidi (assigner) loves and appreciates feedback about officials. It will be kept confidential. She wants to know who isn’t hustling, showing up on time, etc. It’s also important to point out the ones who are doing a great job. Everyone loves to hear they are appreciated

What if I need to a cancel, change or add a game to our assigned schedule?

Please email the assigner (Heidi) at hammerhoops@hotmail.com ASAP. If on short notice, call 763-350-0098. If schools/contact do not inform the assigner of any changes, they will still be obligated to pay officials who show up to work even if the game is cancelled. FYI, you will have officials contact info assigned to your games on Arbiter.

I noticed most of your games assigned are north metro. Can you assign officials elsewhere?

Yes! The majority of games assigned are north metro, but Hammer Sports is expanding. Games have been assigned in St. Paul, Minneapolis, Waconia, Chaska, Jordan, Bloomington, Chisago Lakes, Forest Lake, St Cloud, Sandstone, plus many more. Hammer Sports has a lot of referee connections throughout the state of Minnesota.

A) MYAS baseball - New Hope, Breck HS, Lakeview Terrace Park, Big Willow, Zachary Fields, others, and more to come

B) Lower level High School (9th, B/JV) - Andover HS, Anoka HS, Armstrong HS, Blaine HS, Champlin Park HS, Coon Rapids HS, Cooper HS, St Francis HS, St Louis Park HS, and more to come

C) Middle School – Heritage MS (St Paul)

MYAS tourneys (varies metro locations ) Non-MYAS Winter Travel Tourneys – Maple Grove/Osseo, Orono, Minnetonka, Fridley, Champlin Park, Blaine, Kimball, Wayzata, Mounds View and a few various spring/summer ones TBA Lower level High School games (9th, C, B, JV) - Anoka, Andover, Blaine, Waconia, Becker, Champlin Park, Centennial, Armstrong, Cooper, Spring Lake Park, Coon Rapids, St. Francis, Richfield and more to come House Ball - Spring Lake Park, Centennial, OMGBA, Wayzata Men’s Leagues - Grace Church Eden Prairie, Lifetime Fitness Fridley/St Louis Park/Bloomington, Target Center, Heritage Christian Academy, St Paul Eastside YMCA, Becker, NHCC, Century College, Inver Hills Community College, Minneapolis Community and Technical College Middle School/Church/Youth - Legacy Christian Academy, Centennial, Westwood, St Louis Park, D11 Anoka, Oakview, Roosevelt, Northdale, Coon Rapids, Jackson, King of Grace, New Hope Church, Plymouth Covenant Church, St John’s Lutheran Church, St Paul Eastside YMCA, Friendly Hills MS, Sabes JCC, Special Olympics, and more to come Summer Leagues – Anoka Ramsey CC, Southwest Christian HS Other – from time to time, Hammer Sports help other assigners fill shifts

Lower level high school - St Louis Park and more to come Middle School/Youth - Centennial Youth FB Association, Centennial MS, Irondale Youth and more to come

Lower level High School - BSM, Irondale, Elk River, Maple Grove, Spring Lake Park, Osseo, Park Center, Calvin Christian, Armstrong, St Louis Park, Andover, Anoka, Centennial, Cooper, Totino-Grace, Champlin Park Middle School/Youth - Centennial MS, St Louis Park Jr High, D11 Coon Rapids, St Raphael, Benilde MS

Lower level High School – Andover, Blaine, Coon Rapids, St. Francis, Armstrong Middle School – St Alphonsus, Anoka, Oakview, Jackson, Coon Rapids, Northdale, Roosevelt, Friendly Hills Slowpitch – Ward Park (Anoka) – USSSA Mens, Women’s and Co Rec House – Maple Grove (10U, 12U, Senior Lg)

Lower level high school - Champlin, Cooper, Big Lake, Elk River, Andover, Benilde, Coon Rapids, Irondale, Maple Grove, Park Center, Totino- Grace, Anoka, Armstrong, Calvin Christian, Centennial, Spring Lake Park, STMA, Blaine, Rogers, Mounds View, St Louis Park, Osseo Middle school - Centennial, Westwood, D11 Anoka, Oakview, Roosevelt, Jackson, Coon Rapids, Northdale, Plymouth, St Louis Park, St Alphonsus, King of Grace, Legacy Christian Academy and more to come Adult leagues - Anoka