Seamus Power's whirlwind few days ended with a missed cut at the Safeway Open in California, as Brendan Steele took a step closer to retaining title in as many years with a second round of 67 to lie one shot off the lead.

Waterford man Power regained his PGA Tour card by the skin of his teeth last Monday, just squeezing into the top 25 after the web.com tour finals after finishing in a tie for 48th at the Web.Com Tour Championship.

He had to fly immediately to the season-opening Safeway Open, with his clubs getting lost en route.

A hugely demanding week eventually took its toll as Power added a 75 to his first-round 70 to sit on one-over for the tournament and missing the cut.

After carding 65 in his first round, Steele nailed back-to-back birdies on the 12th and 13th - including a 129-yard approach which landed within inches of the pin - to go five under for the day and 12 under overall.

The current leader Tyler Duncan was tied at the top after the first round but bogeyed on the second, third and fourth to sit at one under for the day after four second-round holes on the front nine.

But he rallied to card a six-under round of 66 with three birdies and an eagle in his last five holes to sit at 13 under.

Fellow American Chesson Hadley struggled on the first round at the course in Napa, California, carding a 72 and potentially missing the cut, but went round in 11-under 61 on the second day to race up into contention.

Among the highlights of his round - which included 10 birdies, an eagle and a single dropped shot on the par-4 sixth - was a 166-yard tee shot on the 15th to set up an eight-foot birdie putt.

Phil Mickleson, 42 time PGA Tour winner, ended the day tied for 15th place with a pair of 3-under rounds of 69 despite a double bogey on the par-four 14th.