After Baltimore plated two first-inning runs, starter Dean Kremer allowed the Guardians to do the same.

Source: https://www.bostonherald.com/2023/09/23/orioles-2-out-rally-in-9th-goes-to-waste-in-9-8-walk-off-loss-to-guardians-as-bullpen-is-again-asked-for-too-much/

Andrew Vaughn's first-inning RBI single gave Chicago a 1-0 lead, but the Mariners responded with two runs in the second via run-scoring singles from Ford and J.P. Crawford.

Source: https://deadspin.com/mlb-roundup-ms-down-white-sox-for-8th-straight-win-1850764911

Garver launched that first-inning slider 396 feet to put the Rangers in front, singled twice more off Maeda, then blasted a 426-foot homer into the Twins bullpen against Cole Sands in the seventh inning, his first four-hit day since he was a Twin.

Source: https://www.startribune.com/minnesota-twins-texas-rangers-adolis-garcia-walk-off-home-run-josh-winder-royce-lewis-mitch-garver/600301834/

He's 5 for 5 — a first-inning home run followed by four singles — with a walk and four RBIs.

Source: https://brobible.com/sports/article/adley-rutschman-megastar/

However, BC looked back on course for another dominant victory after turning a pair of singles into two first-inning scores.

Source: https://www.bakersfield.com/sports/bc-softball-survives-uneasy-glendale-matchup-wins-6-4/article_fdaadbca-cf5b-11ed-9d5c-fb43f894ba19.html

May threw 84 pitches against the Diamondbacks, 56 for strikes, hitting 100 mph with two first-inning pitches and later settling into a 96-98 mph groove with his four-seamer.

Source: https://www.dailybreeze.com/2023/04/01/alexander-the-return-of-dodgers-dustin-may-is-a-qualified-success/

Rafael Devers had a long first-inning, three-run homer, and it seemed the Red Sox were in line for the victory before the Guardians notched four runs in the seventh and tied it on José Ramírez’s RBI single off closer Kenley Jansen in the ninth.

Source: https://www.rep-am.com/sports/2023/04/29/red-sox-rally-to-win-in-10th-after-blowing-lead/

Salvador Perez's first-inning solo homer was the only run the Royals could muster off Giolito.

Source: https://deadspin.com/white-sox-attempt-to-continue-resurgence-in-detroit-1850473526