Buescher, who started 26th, dominated along with RFK Racing team-mate and co-owner Brad Keselowski, as the two combined to lead 190 of the 400 laps.
Buescher emerged as the race leader following the final round of green flag pitstops but saw his big lead over Hamlin disappear when a spin by Daniel Suarez brought out a late caution and set up a restart with three laps remaining.
Hamlin initially stayed close to Buescher, but briefly drifted up the track with two laps to go, which allowed Buescher to get away. He held on and claimed his first victory of the 2023 season by 0.549 seconds.
The win – the third of Buescher’s career and second while at RFK Racing – locks him into this year’s 16-driver playoff field with four races remaining in the regular season.
“That was smooth sailing there trying to take care of [my car],” said Buescher. “These guys over at RFK, the #17 team, gave me a great hot rod. It was so good. Just trying to take care of it there.
“Scott [Graves, crew chief] came over the radio, ‘That’s working perfect, keep it up’ and caution. Yeah, that’s about right. I knew even on our green flag stuff we were so strong during the race; I had a good feeling about it there.
“Pretty awesome to pull it off. Proud of everybody. That was a long way from the back [of the field]. Heck of a race for us.”
Source: Autosport