A putter assembly and the method of converting a putter assembly between a practice configuration and a regulation play configuration. The putter assembly has a shaft. A putter head is attached to the shaft. The putter head has a striking surface for striking a golf ball. A connection receptacle is disposed on the striking surface of the putter head. A training rod is provided that has a predetermined weight. A plug is also provided that has a weight generally equal to that of the rod. Either the rod or the plug can be attached to the connection receptacle in the putter head. When the rod is attached, the putter is configured for use in training, wherein the rod provides a reference guide during putting. When the rod is removed and the plug is set in place, the putter is ready for regulation play.