Caddy Jim MacKay, right, watches as Phil Mickelson tee off on the fourth hole during a practice round for the Masters golf tournament Tuesday, April 8, 2014, in Augusta, Ga. (AP Photo/Chris Carlson)

Photo by: Chris Carlson

Caddy Jim MacKay, right, watches as Phil Mickelson tee off on the fourth hole during a practice round for the Masters golf tournament Tuesday, April 8, 2014, in Augusta, Ga. (AP Photo/Chris Carlson)