Calvin Heimburg Mystery Box - 2026 OTB Open Champion (Pre-Order)

Calvin Heimburg took down the win with a clutch putting performance at the 2026 OTB Open. He led the event from start to finish! To celebrate the win, we are offering 85 limited edition Calvin Heimburg mystery boxes. 

Each mystery box will contain:

• 1 new commemorative OTB Open Champ Stamp
• 3 Assorted Calvin Heimburg stamps 
• 1 Unreleased Innova Big Easy Swamp themed stamp 
• Calvin Heimburg Swag
• Each box is valued over $125