Civic Intelligence

Diamond Baseball League Inc

EIN 20-5892383 • 501(c)3 • Willoughby, OH

Profile

The Diamond League is an amateur baseball league for high school and college aged players in Northeast Ohio.

Refreshing map…

38255 Westminster LnWilloughby, OH 44094

www.diamondleague.org

Siviq Scores

Precomputed percentiles relative to similar nonprofits. These scores are descriptive rather than judgmental.

Liabilities / Assets

79th percentile

0.11x

Higher debt load relative to assets than 79% of similar nonprofits.

501(c)3 • <$500k nonprofits • Source year 2025

Liabilities / Revenue

81st percentile

0.07x

Higher debt load relative to revenue than 81% of similar nonprofits.

501(c)3 • <$500k nonprofits • Source year 2025

Net Margin

65th percentile

11%

Higher net margin than 65% of similar nonprofits.

501(c)3 • <$500k nonprofits • Source year 2025

Top Officer Pay

81st percentile

$0

Higher top officer pay than 81% of similar nonprofits.

Top officer pay equals 0.0% of source-year revenue.

501(c)3 • <$500k nonprofits • Source year 2025

Asset Growth

Score unavailable

No value available

No earlier valid filing was available within the previous three public years.

Source year 2025

Revenue Growth

Score unavailable

No value available

No earlier valid filing was available within the previous three public years.

Source year 2025

Balance Sheet
Liabilities / Assets79th percentile

Assets

$37,274

No earlier filing loaded for comparison.

Liabilities

$4,170

No earlier filing loaded for comparison.

Net Assets

$33,104

No earlier filing loaded for comparison.

Operations
Liabilities / Revenue81st percentileNet Margin65th percentile

Revenue

$58,825

No earlier filing loaded for comparison.

Expenses

$52,464

No earlier filing loaded for comparison.

Net Income

$6,361

No earlier filing loaded for comparison.

Trend Graphs

Balance Sheet Trend

Asset GrowthScore unavailable

Grouped bars show assets, liabilities, and net assets across loaded filings.

$40K$30K$20K$10K$0Assets 2025: $37,274Liabilities 2025: $4,170Net Assets 2025: $33,1042025

Highlighted filing

2025

Assets$37,274
Liabilities$4,170
Net Assets$33,104
Open 2025 Filing

Operations Trend

Revenue GrowthScore unavailable

Revenue, expenses, and net income by year, with the latest filing highlighted.

$60K$40K$20K$0Revenue 2025: $58,825Expenses 2025: $52,464Net Income 2025: $6,3612025

Highlighted filing

2025

Revenue$58,825
Expenses$52,464
Net Income$6,361
Open 2025 Filing

Filings

Most recent year

2025 • Form 990EZDetailed filing. Detailed filing data is available for this year.

Open filing
Assets
$37,274
Liabilities
$4,170
Net assets
$33,104
Revenue
$58,825
Expenses
$52,464
Net income
$6,361
Balance SheetOperations
YearAssetsLiabilitiesNet AssetsRevenueExpensesNet Income
2025Detailed filing. Detailed filing data is available for this year.$37.3$4.17$33.1$58.8$52.5$6.36
Latest Filing Detail
Jump To
Filing Snapshot
Filing Period
Oct 1, 2024 to Sep 30, 2025
Signed
Jan 27, 2026
Return Version
2024v5.1
Gross Receipts
$58,825
Mission and Program Overview

Mission

The Diamond League is an amateur baseball league for high school and college aged players in Northeast Ohio.

Program Services

DescriptionGrantsExpenses
NABF World Series Events. The Diamond League has run this past season the NABF World Series for 16u 18u and 23u age divisions.$0$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.$0$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.$0$3,300
Compensation and Service Providers
Top Officer Pay81st percentile

Employees

NameTitleFull / Part TimeBaseOtherTotal
Dominic GruttadauriaVice PresidentPT$0--
John MengelkampPresidentPT$0--
Filing and Contact Details

Filer

Filer Name
Diamond Baseball League Inc
EIN
20-5892383
Address
38255 Westminster Ln, Willoughby, OH 44094

Signing Officer

Name
John J Mengelkamp
Title
President
Phone
4407259293
Signed
2026-01-27
Supplemental Narrative

Additional Explanations

Part I, line 10

“| Grants And Similar Amounts Paid:, Amount:| donation to NABF scholarship fund, $200|”

Part I, line 16

“| Other Expenses:, Amount:| Tournament and playoff costs of umpires baseballs etc., $27527|”

Part II, line 24

“| Explanation:, BOYAmount:, EOYAmount:| Prepaid cost of field rental for future seasons, $6750, $6750| Computer and tablet, $1866, $0|”

Part II, line 26

“| Explanation:, BOYAmount:, EOYAmount:| Forfeit Fees, $3740, $4170|”

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This appendix keeps the raw XML leaves available for debugging and edge-case review. The human report above is the primary experience.

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IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt0| Grants And Similar Amounts Paid:, Amount:| donation to NABF scholarship fund, $200|
IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt1| Other Expenses:, Amount:| Tournament and playoff costs of umpires baseballs etc., $27527|
IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt2| Explanation:, BOYAmount:, EOYAmount:| Prepaid cost of field rental for future seasons, $6750, $6750| Computer and tablet, $1866, $0|
IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt3| Explanation:, BOYAmount:, EOYAmount:| Forfeit Fees, $3740, $4170|
IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc0Part I, line 10
IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc1Part I, line 16
IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc2Part II, line 24
IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc3Part II, line 26
ReturnHeader/BuildTS02025-03-06 01:10:19Z
ReturnHeader/BusinessOfficerGrp/PersonNm0John J Mengelkamp
ReturnHeader/BusinessOfficerGrp/PersonTitleTxt0President
ReturnHeader/BusinessOfficerGrp/PhoneNum04407259293
ReturnHeader/BusinessOfficerGrp/SignatureDt02026-01-27
ReturnHeader/Filer/BusinessName/BusinessNameLine1Txt0Diamond Baseball League Inc
ReturnHeader/Filer/BusinessNameControlTxt0DIAM
ReturnHeader/Filer/EIN0205892383
ReturnHeader/Filer/ForeignPhoneNum04407259293
ReturnHeader/Filer/USAddress/AddressLine1Txt038255 Westminster Ln
ReturnHeader/Filer/USAddress/CityNm0Willoughby
ReturnHeader/Filer/USAddress/StateAbbreviationCd0OH
ReturnHeader/Filer/USAddress/ZIPCd044094
ReturnHeader/ReturnTs02026-01-16T16:34:07-05:00
ReturnHeader/ReturnTypeCd0990EZ
ReturnHeader/TaxPeriodBeginDt02024-10-01
ReturnHeader/TaxPeriodEndDt02025-09-30
ReturnHeader/TaxYr02024

Document Assets

No mirrored PDF or thumbnail assets are attached yet.

Peer Organizations

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