Bummer signed a two-year, $13 million contract with Atlanta on Saturday.
Atlanta president of baseball operations Alex Anthopoulos said Friday that the team plans to pick up Bummer's $7.25 million club option for 2025, Grant McAuley of 92.9 The Game Atlanta reports.
Bummer (3-2) picked up the win Friday over the Marlins, allowing one hit and striking out two in a scoreless eighth inning.
Bummer has posted a 3.62 ERA, 1.52 WHIP and 37:11 K:BB through 32.1 innings with two wins, zero saves and zero holds through 33 appearances.
Bummer (2-2) picked up the win Thursday over the Nationals, striking out one in a perfect seventh inning.
Bummer (1-1) was credited with the win Monday against the Astros, giving up one hit in a scoreless two-thirds of an inning.
Bummer (0-1) got charged with a blown save and took the loss Sunday against the Phillies, giving up two runs on four hits while striking out one in the seventh inning.
Bummer gave up a run on two hits while striking out two in an inning of relief during Thursday's Grapefruit League game against the Rays.
Bummer was traded from the White Sox to Atlanta on Thursday in exchange for Michael Soroka (forearm), Jared Shuster, Nicky Lopez, Braden Shewmake and Riley Gowens.
Bummer has recorded three holds in his last five appearances for the White Sox.