Tighten the screws: keep arms tucked in on short shots
Setting up for short pitch shots, the instructor keeps his armpits and arms tucked in close to his body — a feel he calls 'tightening the screws.' He doesn't want the arms hanging loose and all over the place; the cue is to bring them in before the swing.
Channel: Danny Maude
Watch official source at 1:35Why this context matters
Part of a wider pitching lesson built around a 'tabletop' image.