Adjustable length putter

An adjustable length putter comprising:

• a putter head having a contact face adapted to contact a golf ball;
• a grip portion having a graspable surface adapted to be grasped by a golfer;
• and
• a shaft portion connecting the grip portion to the putter head, wherein the shaft portion has a length adjustment mechanism comprising an outer shaft having a substantially circular cross section and a hollow interior, an inner shaft having a substantially circular cross section and being slidable within the hollow interior of the outer shaft, and a clamping mechanism moveable between an unlocked position in which the inner shaft is able to slide within the outer shaft and a locked position in which the inner shaft is prevented from sliding within the outer shaft;
• wherein the clamping mechanism comprises a constrictor clamp, the constrictor clamp having a clamp body that defines a passageway that receives the outer shaft, wherein the constrictor clamp comprises a clamp actuator having a cam member rotatable by a pivot arm, wherein the clamp actuator moves the clamping mechanism from the unlocked position to the locked position by rotation of the pivot arm which causes the cam member to press against the clamp body to cause the clamp body to deform and constrict and press against the shaft portion by changing a cross-sectional dimension of the passageway, and
• wherein the adjustable length putter is moveable from an extended configuration to a retracted configuration by sliding the inner shaft within the outer shaft when the clamping mechanism is in the unlocked position.