2026-01-16T16:34:07-05:00 2025-09-30 990EZ 2024-10-01 205892383 Diamond Baseball League Inc DIAM 4407259293 38255 Westminster Ln Willoughby OH 44094 John J Mengelkamp President 4407259293 2026-01-27 2024 2025-03-06 01:10:19Z X www.diamondleague.org X X 58825 X 8500 29366 20959 0 0 0 58825 200 0 0 1140 23585 12 27527 52464 6361 26743 33104 X 21867 30524 0 0 8616 6750 30483 37274 3740 4170 26743 33104 The Diamond League is an amateur baseball league for high school and college aged players in Northeast Ohio. NABF World Series Events. The Diamond League has run this past season the NABF World Series for 16u 18u and 23u age divisions. 0 28361 Diamond League Tournament at beginning of the season. The Diamond League runs a league tournament at the beginning June of the league season. 0 9515 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 3300 41176 Dominic Gruttadauria Vice President 5 0 0 0 John Mengelkamp President 5 0 0 0 false false false false false 0 false false false false John Mengelkamp 755 E 349th St Eastlake OH 440952423 4407259293 false false false false false false false false false false false NONE NONE true X 7400 7900 7980 8780 8500 40560 18745 14680 15820 20972 50324 120541 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 26145 22580 23800 29752 58824 161101 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 161101 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 26145 22580 23800 29752 58824 161101 1 0.00 0 0.00 X RESTRICTED RESTRICTED RESTRICTED RESTRICTED RESTRICTED RESTRICTED RESTRICTED RESTRICTED 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|