BLAINE, Minn. (AP) — 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 one shot behind Tommy Armour III, but birdied six of his first 10 holes to open up a three-shot lead.
Calcavecchia’s lead shrunk to one before back-to-back birdies on the 15th and 16th. But he had bogeys at No. 17 and another at the par-5 18th, which ranked as the day’s second-easiest hole, to finish with a 66.
