Jon Rahm and Billy Hurley III share the lead at the US PGA Tour event in Maryland, three strokes ahead of Vijay Singh going into the weekend.
Playing together again on Friday, Rahm and Hurley went shot-for-shot to reach 11-under overall at Congressional Country Club.
Hurley, a Naval Academy graduate who lives in nearby Annapolis, shot a 6-under 65, and Rahm - who led after the first round on 64 - bogeyed the 18th hole for a 67 in his second round as a professional.
Rahm and Hurley will play in the final group on Saturday just behind Singh, who was alone at 8-under after a 66.
Four-time major champion Ernie Els (69) was 7-under along with Webb Simpson (68), Bill Haas (69) and Harold Varner III (69).
News that makes sense
Your trusted source for staying up-to-date with the world around you. Get free daily news updates and analysis, straight to your inbox.
Aussies John Senden (70) at 5-under and Marc Leishman (71) at 4-under need a low third-round score to have a chance of victory.
While Els was disappointed with his play on Friday, Singh turned in a 66 that was most memorable for his shot from the edge of the water on No.18.
The 53-year-old Singh hasn't won on the PGA Tour since 2008. He's in position to become the oldest PGA Tour winner, but said he wasn't thinking about making that kind of history.
Singh looked to be in trouble on the 18th when he hit into the rough under a tree and then landed his approach shot just inches from the water. He rolled up his pants and waded in to hit the shot that dropped him to 8 under at Tiger Woods' annual tournament.
"I was unfortunate that it went that far in and fortunate that it stayed out," Singh said. "I kept sinking when I got in the water. I started out with just my foot in the water and then it started getting up to my ankles. The more I moved the deeper I went, so I kind of had to play a very safe shot. I got away with a bogey."
Rickie Fowler had just one bogey in his second round and was in the clubhouse two strokes back from Singh after shooting a 68. Fowler will end his streak of missing the cut at three.
"I was able to just kind of stay patient and give myself a lot of looks at birdie, which is always good," Fowler said. "Nice to have a tee time on the weekend."
