Zach Johnson, the John Deere Classic winner in 2012, is two shots off the lead following a six-under 65 in the first round at TPC Deere Run in Silvis, Ill.
Johnson, an Iowa native and local favorite whose last victory came at the 2015 British Open, trails Andrew Loupe by two strokes and is tied with Patrick Rodgers, Ryan Moore and Tom Gillis for second.
"I made some putts, that's really what it was," said Johnson. "I think I missed a couple of greens -- my last two holes, eigh and nine -- and it was a pretty solid, kind of boring day."
Loupe, looking for his first PGA Tour win, was eight under through 14 bogey-free holes on a day that included a long weather delay. He will finish his round on Friday morning.
Scott Pinckney and Scott Brown each shot five-under 66s, three shots off the lead. Geoff Ogilvy and Morgan Hoffman are at five under, having played 12 and 14 holes, respectively.
Wesley Bryan, playing with his PGA Tour card after winning his third Web.com event last week, was two under through 10 holes.
Jon Rahm, the 21-year-old Spaniard, is one over through seven holes.
Play was suspended at 11:38 a.m. EST due to heavy rain and lightning, and did not resume until 3:08 p.m. Play was ultimately postponed for darkness at 8:55 p.m., with 78 players still playing their first round. The first round will conclude Friday morning beginning at 7 a.m.
[Click here for the entire leader board from TPC Deere Run.] (http://www.golfdigest.com/story/pga-tour-leaderboard)