Holding Flag Stick
Question: - Can I hold the flag stick with one hand and putt with the other?
The rules state that you can do this providing that the flag stick has been removed from the hole (Decision of the Rules of Golf 17-1/5)
If the ball were to strike the flag stick you would breach rule 17-3a and incur a 2 shot penalty for strokeplay or loss of hole matchplay.
You must ensure that the flagstick is not touching the ground whilst you are putting.