complex systems in sports

The “Stay Closed” Cue Could Be Wrecking Your Delivery

Randy Sullivan2026-06-07T22:23:49-04:00

The “Stay Closed” Cue Could Be Wrecking Your Delivery I [...]

The “Stay Closed” Cue Could Be Wrecking Your DeliveryRandy Sullivan2026-06-07T22:23:49-04:00

Randy Sullivan2026-04-24T09:10:43-04:00

Walk into almost any bullpen at the beginning of the [...]

All Effort, No Efficiency: Why Your Velocity Gains Don’t StickRandy Sullivan2026-04-24T09:10:43-04:00

Randy Sullivan2026-05-11T09:45:44-04:00

Everywhere you look in baseball right now, somebody is bragging [...]

The BS Side of “Data-Driven”Randy Sullivan2026-05-11T09:45:44-04:00