The Latest: McIlroy-Spieth Duel Takes Interesting Turn

SHEBOYGAN, Wis. — The Latest from the PGA Championship at Whistling Straits (all times local):

10:42 a.m.

Rory McIlroy may be ranked No. 1, but he just took a backseat to Jordan Spieth, his latest challenger for the throne.

The Northern Irishman had trouble with both his wedge and putter and wound up with a double-bogey 6 at the last hole of their front nine. Spieth made birdie there and was at 2-under 34 for his front nine, and in the mix for the lead as the tournament nears the midway point.

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10:25 a.m.

David Lingmerth finally found some trouble at Whistling Straits. Scott Piercy — he's still cruising along.

Lingmerth hit his tee shot onto the beaches of Lake Michigan on No. 7 en route to a…