Coming one day after Josef Newgarden won the Indianapolis 500 for Team Penske, Blaney won out in a race delayed one day by rain after beating William Byron's Hendrick Chevrolet at a restart with 20 laps to go.
Blaney and Byron had traded the lead multiple times during the race, with Byron having the added advantage of the first pit stall which repeatedly gave him the lead off pit road.
The win is Blaney's first in a points-paying race since his August 2021 victory at Daytona, although he did win last year’s non-points All-Star Race at Texas Motor Speedway.
"It's so cool just to be a part of it, let alone win it," Blaney said after celebrating with fans in the grandstands, much like Newgarden did on Sunday.
Asked what the result meant given his last victory was nearly two years ago, Blaney added: "You start to get to feel like you can't win anymore when you don't win in a while. It kind of gets hard.
"So, just super thankful to the No. 12 guys for believing in me. Thank you (fans) for sticking around. Really appreciate it."
Byron, who had been awarded pole after the rain also caused Saturday's qualifying session to be washed out, had edged Christopher Bell to claim the Stage 1 win in a photo finish.
The second stage was disrupted by light rain that caused a 31-minute delay in proceedings. An accident involving Chase Elliott and Denny Hamlin exiting Turn 4 on lap 186, Elliott squeezed into the wall before bouncing into Hamlin and turning the Toyota into the wall, then ended the race early for both drivers.
Source: Autosport