Move the grip the same direction as the putter head
The coach recounts advice from Doug Sanders, who watched him putt: if you learn to move the putter grip the same direction as the putter head, you'll become a much better putter. He frames the fault as the grip moving opposite the head - grip going forward while the head goes back, or the reverse.
Channel: PorzakGolf
Watch official source at 19:16Why this context matters
Coach relays a tip he got from Doug Sanders.