HIGHLAND — Ryan Brehm and Willie Mack III have separated themselves from the pack.
Both shot 5-under-part rounds of 67 to put them at 12-under through two rounds of the 97th Michigan Open Championship at Prestwick Village Golf Club.
Brehm, from Grand Rapids, and Mack, from Grand Blanc, are four shots ahead of five different golfers halfway through the tournament.
Brehm is a two-time Michigan Open champion, having won the event in 2009 and 2010. In both instances he earned his titles after taking early leads, a feat he'll look to accomplish a third time.
Grand Traverse Resort's Scott Hebert shot a 69 on Tuesday to get to 8-under for the tournament and is among the group chasing the two leaders. Petoskey's Joey Garber, who shared the lead with Brehm and Mack after one round, shot a 71 and also is at 8-under. Andy Ruthkowski, who won the Open in 2007, and Eric Lilleboe, a mini-tour pro from Okemos, had the low rounds of the day, each with 65s, to join the crowd tied for third. Henry Do of Canton is the other golfer in the 8-under pack.
Defending champion Tom Werkmeister of Kentwood rallied with a 68 and is in the group tied for eighth at 6-under par, along with Eastern Michigan golfer Kyle Rodes, who carded a 66 on the day, and mini-tour golfer Joe Juszczyk , who fired a 68.
Gaylord amateur Alexander Dombrowski, was at 5-under par after a 69.
Lee Houtteman, the club pro at Manitou Passage Golf Club, is tied for 18th at 3-under par. Houtteman teamed with Nikolaj Brons-Piche, a Traverse City Central grad, to win the Nike State Pro-Am Championship last week. They finished at 13-under par in that event.