# The Quadrilateral

> A year-round newsletter from one of golf’s last independent voices devoted to all things Grand Slam and the best Cup events.

- **Platform:** substack
- **Category:** Sports
- **Subscribers:** 16K
- **Paid subscribers:** 2K
- **Last updated:** 2026-04-01
- **URL:** https://quadrilateral.substack.com
- **Profile:** https://newsletterinsights.io/newsletter/quadrilateral