The U.S. Amateur, the USGA’s oldest championship, is known as a test of fortitude, and the patience and resilience factors for the 312-player field were ramped up on Tuesday afternoon when play in the championship’s 121st edition was halted for nearly four hours by storms in the area.

The morning wave of players on both Oakmont Country Club – which is hosting the championship for a record-tying sixth time – and stroke-play co-host the Longue Vue Club, in nearby Verona, Pa., were able to complete 36 holes of stroke play. However, the 156 afternoon starters in the field will have to complete Round 2 on Wednesday, starting at 7:30 a.m. EDT, after which the 64-player bracket for match play will be decided, likely in the early afternoon. The Round of 64 will begin after a playoff, if necessary, to decide the final spots in the bracket.

Brad Reeves, of Woodbridge, Calif., completed 36 holes at 5-under-par 135 on Tuesday, tacking an even-par 70 at Oakmont Country Club onto the 5-under 65 he shot on Monday at Longue Vue to hold the lead among those who finished. Cole Sherwood, of Austin, Texas, who recorded the only under-par round on Oakmont on Monday, a 1-under 69, added a 68 at Longue Vue and stood second among those who completed play at 3-under 137.

Cooper Schultz, of Wichita, Kan., and Hugo Townsend, of Sweden, were next at 2-under 138, while Trent Phillips, of Boiling Springs, S.C., and Devon Bling, of Ridgecrest, Calif., the runner-up to Viktor Hovland in the 2018 U.S. Amateur at Pebble Beach, were the only other players who finished on Tuesday to post under-par scores, at 1-under 139. Donald Kay, of San Diego, improved by 10 strokes on Tuesday at Longue Vue (75-65) and was one of three players at even-par 140.

Reeves, 23, a recent graduate of the University of Arizona, had a roller-coaster day at nine-time U.S. Open host Oakmont on Tuesday, with six pars, six birdies and six bogeys.

“It was blowing [before the delay] and there were holes that were playing ridiculously hard,” said Reeves, who was the 2021 Pacific 12 Player of the Year. “My birdie run [on Holes 4, 6 and 7] came from just trying to hit on the smart side, and if you made par, knowing that that was a really good score. I was struggling, grinding it out, but I knew everybody else was probably doing the same thing.”

Among the afternoon starters whose rounds were halted by darkness at 8 p.m. (with players allowed to finish the hole they were currently playing), Mark Goetz, of nearby Greensburg, Pa., led the way at 9 under par. Goetz was 3 under for the day through 12 holes at Oakmont (he started on No. 10) without a bogey on his card.

Jacob Bridgeman, whose 7-under 63 at Longue Vue on Monday tied the course record and gave him the Day 1 lead, was at that same figure through seven holes at Oakmont. Brian Ma, of Milpitas, Calif., was also at 7 under, having played his first four holes at Oakmont in 2 under before play was halted. Travis Vick, whose eagle on the par-5 12th at Oakmont on Tuesday helped him get to 3 under through eight holes and 6 under total, was joined at that mark by Joe Highsmith, of NCAA champion Pepperdine, who was even for the day at Oakmont through 10 holes after a 64 at Longue Vue on Monday.