Berkmeyer, from St. Louis, had a 2-under 138 total. He opened with a 67 on Saturday at Brown Deer Park. Mickelson, the younger brother of tour star Phil Mickelson, shot a 70, also at Milwaukee Country Club. Hes from San Diego.
Ive played well all summer, and Im pretty pleased, the 34-year-old Berkmeyer said. My game has gotten better as Ive gotten older. Hopefully, it will get better this week. I feel now like I belong and Im more comfortable out here. This is my favorite event. This is what I play for.
Tim Jackson, the 1994 and 2001 winner from Germantown, Tenn., had a 75 at Brown Deer Park to tie for third with Derek Bell of Duvall, Wash., at even par. Bell shot a 70 at MCC, the site of the 64-man, match-play competition.
The tournament is open to amateurs 25 years old or older.