The American trio of Vaughn Taylor, Andrew Loupe and Jerry Kelly all share the lead at six under after the first round of the Travelers Championship.
Each shot a 64 on the opening day of action at TPC River Highlands in Cromwell, Connecticut on Thursday.
Taylor, who ended an 11-year wait for a win on the PGA Tour in February, shot one birdie on the front nine but sunk five in a row on the home stretch.
5 straight birdies. Co-leader.-- PGA TOUR (@PGATOUR) August 4, 2016
12th: 5 feet
13th: 2 feet
14th: 4 feet
15th: 6 feet
16th: 8 feet pic.twitter.com/EdruALAMnJ
Loupe, meanwhile, also began on the front and was sitting at six under after 13 holes, but struck a bogey on the 16th.
However, the 27-year-old recovered with par and a birdie from his last two holes, helping him take a share of the lead.
Kelly was the only one of the leaders to begin on the back nine, with a birdie on the last hole also putting him at six-under-par 64.
The 49-year-old's highlight included an eagle on the 15th, as he looks to win his first PGA Tour tournament since 2009.
Ben Martin, Marc Leishman - winner in 2012 - and John Rahm sit one stroke behind tied for fourth, with Daniel Berger and Carlos Ortiz both on four under tied for seventh.
A total of 15 are on three under tied for ninth, including last year's winner Bubba Watson.
Watson, 37, hit a bogey-less round but could only manage three birdies, seeing him three shots off the pace going into the second round on Friday.
Meanwhile, Kim Si-koo managed a hole-in-one on the fifth hole - the first ace at the Travelers Championship since 2011.