CROMWELL, Conn. — The rest of the field took their best runs at Jordan Spieth, but the 23-year-old star remained king of the mountain at the Travelers Championship for another day.

Spieth sank a 20-foot birdie putt on the 18th hole to take an one-shot lead over Boo Weekley on a low-scoring Saturday at TPC River Highlands.

“It’s not the easiest course to hold the lead on,” Spieth said. “I think I said the same thing at the John Deere in 2015. I was leading after 54 (holes) by a shot or two, and it’s just not the easiest course because guys get out there an hour before you tomorrow in twosomes and all of a sudden there’s a group that is one back or you may not be leading anymore.”

Spieth, who is trying for his 10th career win, finished the round at 4-under 66 and is 12-under overall. After shooting 7-under in the opening round on Thursday, Spieth has only lost the lead for a hole twice, with Charley Hoffman holding it briefly in the third round.

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“I think I’ve got to stay really positive,” he said. “I’ve got to stay focused on my goal. Just any other noise that’s out here, throw it out the window, stay focused on the goal that we set for the round tomorrow.”

While Spieth has become one of the golden boys of golf, Weekley, 43, is the tour grinder who has battled back from injuries and personal problems to stay on tour. He posted four birdies on the back nine to shoot 5-under (11-under overall) and is looking for his first win since the 2013 Crowne Plaza Invitational at Colonial.

“It’s been awhile since I’ve been sitting up here,” Weekley said about being brought into the media room after his round. “I’ve been having some personal troubles back home and I’ve been trying to get that…