Nonprofit · EIN 20-5892383
DIAMOND BASEBALL LEAGUE INC
Also known as WESTERN RESERVE COLLEGIATE LEAGUE
Tax-exempt · WILLOUGHBY, OH 44094
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| September 30, 2025 | 990-EZ | $58,825 | $52,464 | $6,361 | $37,274 | $4,170 | $33,104 |
Financial details: 990-EZ for the year ended September 30, 2025
Revenue
- Contributions, gifts and grants
- $8,500
- Membership dues
- $20,959
- Program service revenue
- $29,366
Expenses
- Grants and similar amounts paid
- $200
- Compensation of officers, directors and key employees
- $0
- Salaries, compensation and benefits (total)
- $0
- Professional fees and payments to contractors
- $1,140
- Occupancy
- $23,585
- Printing, publications and postage
- $12
- Other expenses
- $27,527
- Program services (functional)
- $41,176
Balance sheet and other
- Total assets, start of year
- $30,483
- Total assets, end of year
- $37,274
- Total liabilities, end of year
- $4,170
- Net assets, end of year
- $33,104
- Cash, savings and investments
- $30,524
- Gross receipts
- $58,825
From the e-filed returns the IRS publishes as XML (latest three processing years; amended returns replace the original). PDF copies at the IRS.
Officers, directors and key employees
As listed on the 990-EZ for the year ended September 30, 2025, highest compensation first.
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| Dominic Gruttadauria | Vice President | 5 | $0 |
| John Mengelkamp | President | 5 | $0 |
Address and contacts
- Address (IRS master file)
- 38255 WESTMINSTER LN, WILLOUGHBY, OH 44094-8807
- In care of
- % JOHN MENGELKAMP
- Mailing address (990-N for 2023)
- 38255 Westminster Ln, Willoughby OH 44094
- Principal officer (990-N for 2023)
- John J Mengelkamp, 755 East 349th, Eastlake OH 44095
- Signed the 990-EZ
- John J Mengelkamp, President
- Website
- www.diamondleague.org
Mission
The Diamond League is an amateur baseball league for high school and college aged players in Northeast Ohio.
Program accomplishments
- NABF World Series Events. The Diamond League has run this past season the NABF World Series for 16u 18u and 23u age divisions.Expenses $28,361
- Diamond League Tournament at beginning of the season. The Diamond League runs a league tournament at the beginning June of the league season.Expenses $9,515
- Registrations with the NABF. We register the Diamond League teams with the National Amateur Baseball Federation so they can play in their World Series events.Expenses $3,300
What it must file and when
IRS records say it files Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N. Its accounting year ends in September, so each return is due on the 15th day of the 5th month after that.
| Tax year | Year ended | Due | IRS public records |
|---|---|---|---|
| 2025 | September 30, 2026 | February 16, 2027 | Not due yet |
| 2024 | September 30, 2025 | February 17, 2026 | 990-EZ on file |
| 2023 | September 30, 2024 | February 18, 2025 | 990-N on file |
IRS record
- EIN
- 20-5892383
- Tax-exempt status
- 501(c)(3): Charitable, religious, educational or scientific organization
- Foundation status
- Publicly supported organization (509(a)(2))
- Donations deductible (Pub 78)
- Public charity, 50% deduction limit
- Exempt since
- 2007
- Accounting year ends
- September
- Files
- Form 990 or 990-EZ
- Category (NTEE)
- Recreation and sports (N63)
- Assets (IRS master file)
- $37,274
- Income (IRS master file)
- $58,825
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990-EZ | September 2025 | $58,825 | $52,464 | $37,274 | XML |
| 990-N for 2023 Officer: John J Mengelkamp | September 30, 2024 | ≤ $50,000 receipts | – | – | e-Postcard |
| 990-N for 2022 Officer: John Mengelkamp | September 30, 2023 | ≤ $50,000 receipts | – | – | e-Postcard |
| 990-N for 2021 Officer: John J Mengelkamp | September 30, 2022 | ≤ $50,000 receipts | – | – | e-Postcard |
| 990-N for 2019 Officer: John Mengelkamp | September 30, 2020 | ≤ $50,000 receipts | – | – | e-Postcard |
| 990-N for 2018 Officer: John Mengelkamp | September 30, 2019 | ≤ $50,000 receipts | – | – | e-Postcard |
990-N: the IRS bulk file holds only the latest e-Postcard per organization; earlier years come from archived copies of that file since 2020 and can have gaps (the IRS e-Postcard search lists every one). 990, 990-EZ, 990-PF, 990-T: every e-filed return in the IRS e-file index since 2019; XML for the latest three processing years, amounts from the IRS Statistics of Income extracts before that. PDF copies and determination letters at the IRS (search EIN 20-5892383).
Questions about DIAMOND BASEBALL LEAGUE INC
- What is the EIN of DIAMOND BASEBALL LEAGUE INC?
- The employer identification number (EIN) of DIAMOND BASEBALL LEAGUE INC is 20-5892383.
- Is DIAMOND BASEBALL LEAGUE INC tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2007.
- Are donations to DIAMOND BASEBALL LEAGUE INC tax-deductible?
- Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
- Which annual return does DIAMOND BASEBALL LEAGUE INC file?
- Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N.
- When is the next return of DIAMOND BASEBALL LEAGUE INC due?
- The return for tax year 2025 (the year ending September 30, 2026) is due February 16, 2027. Form 8868 extends it by six months; the 990-N cannot be extended.
- When did DIAMOND BASEBALL LEAGUE INC last file with the IRS?
- The latest return in the IRS public files is the 990-EZ for the year ended September 2025.
- Who is the principal officer of DIAMOND BASEBALL LEAGUE INC?
- The 990-N for 2023 names John J Mengelkamp.
- Who are the officers and directors of DIAMOND BASEBALL LEAGUE INC?
- The 990-EZ for the year ended September 30, 2025 lists 2 people; 0 received compensation from the organization.
- How much revenue does DIAMOND BASEBALL LEAGUE INC have?
- On its 990-EZ for the year ended September 30, 2025 it reported revenue of $58,825, expenses of $52,464 and total assets of $37,274 at year end.
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