Grant85
Head Pro
I have seen the following at the Masters - was probably about 8 years ago.
Tom Watson waiting on a tee having pulled a few short putts earlier in the round. He was hitting his ball on the teeing area with his putter while waiting for the group ahead of him to play their second shots. i.e. specifically not putting on a green and specifically not during the playing of a hole.
The commentator - Ewen Murray - was in no doubt that this was perfectly legal.
Tom Watson waiting on a tee having pulled a few short putts earlier in the round. He was hitting his ball on the teeing area with his putter while waiting for the group ahead of him to play their second shots. i.e. specifically not putting on a green and specifically not during the playing of a hole.
The commentator - Ewen Murray - was in no doubt that this was perfectly legal.