McIlroy, Mickelson struggle early as Walker grabs PGA lead

Jimmy Walker birdied five of his first 10 holes to seize a two-stroke lead early in Thursday's first round of the PGA Championship while Rory McIlroy and Phil Mickelson struggled. Walker, a 37-year-old American who missed the cut in three of his past four major starts, was on five-under through 11 holes at par-70 Baltusrol after starting his round off the 10th tee. Brian Stuard, a 143rd-ranked American who won his first US PGA Tour title this year at New Orleans, was second on four-under after 1