LOUISVILLE, Ky. – Ready. Aim. That, Michael Block says, is the biggest mistake amateurs make. Block? He’s a teaching pro, though after last year’s PGA Championship, and the final-round pairing with Rory McIlroy, and the final-round hole in one, and one of the highest club-pro finishes ever, and with the flood of opportunities that have popped up because of all that – golf with Max Verstappen and DJ Khaled, for example – he’s had to pause curing slices and fixing grips. But he’s still at Arroyo Trabuco, his club in Mission Viejo, Calif.