Stanford Blood Center is giving every blood donor in June a voucher for two free Giants tickets — and Monday donors at three locations also score a $20 e-gift card. Window closes June 30.

Stanford Blood Center is giving every blood donor in June two free San Francisco Giants tickets. The promotion ends June 30 — you have less than two weeks.

Donate at any of Stanford Blood Center's four Bay Area locations — Menlo Park, Mountain View, South Bay (Campbell), or Tri-Valley (Dublin) — and you'll leave with a physical redemption card printed with a unique code. Log into the Giants ticketing site, enter the code, pick your game. No credit card required. The tickets are good for one of 20 select home games between July 24 and September 21, against opponents including the Astros, Cardinals, Padres, Angels, and Twins.

Here's the stack worth knowing: Stanford runs a second promotion alongside the tickets — a $20 e-gift card, emailed within minutes of online redemption, for donating on any Monday at the Menlo Park, Mountain View, or Campbell centers. (Tri-Valley donors get the same deal on Tuesdays instead.) A Bay Area redditor who donated on a Monday last week confirmed walking out with both the Giants voucher and the gift card from a single visit.

Stanford hasn't explicitly published that the two offers combine from one donation — they're listed separately on the promotions page — so it's worth confirming at the front desk before you sit down.

To schedule: stanfordbloodcenter.org. Standard criteria apply — 17 and up (or 16 with parental consent), good health. Redeem the tickets by September 21.