Hamilton golfer Steven Alker remains in contention for his second Web.com Tour title of the season, sitting two shots back at the halfway stage of the Boise Open in Idaho.
The 41-year-old, who opened with a nine-under par 62 to share the lead at the Hillcrest Country Club, carded a three-under par 68 in the second round to slip back to a share of fifth place.
The Utah Open champion from three weeks ago will begin the third round two shots back Scotland's Russell Knox, who became the second player in a month to shoot a 59 on the tour.
Alker made six birdies and three bogeys in his second round effort. In his current place on the leaderboard he is projected to climb from 21st on the Web.com Tour money-list to 15th.
Danny Lee, who is ninth on the order of merit, climbed 50 places in round two when he carded a seven-under par 67 to get into a share of 23rd place.