Practice balls sit in frozen slush on the practice range before play resumes for the first round of the WGC-Accenture Match Play Championship, Thursday, Feb. 21, 2013, in Marana, Ariz.

Practice balls sit in frozen slush on the practice range before play resumes for the first round of the WGC-Accenture Match Play Championship, Thursday, Feb. 21, 2013, in Marana, Ariz.