Thomas Detry posted eight birdies in a seven-under-par 64 on Friday to power to a two-stroke lead over Alex Smalley and Michael Kim midway through the US PGA Tour Phoenix Open.Belgium’s Detry, chasing a first US tour title, bounced back from his only bogey of the day at the 14th with birdies at the 16th and 17th to card a 64 for a 12-under total of 130.