By The Associated Press / The Bulletin
August 8, 2010
BLAINE, Minn. — David Frost shot a 6-under 66 and was tied with Mark Calcavecchia for the lead after two rounds of the 3M Championship.
John Cook (67), Kirk Hanefeld (64) and David Peoples (66) were two shots back.
In his fifth tour event since turning 50 on June 12, Calcavecchia started the day....