Chase Dollander picked up a win in his major league debut, tossing five solid innings, and the Colorado Rockies beat the Athletics 12-5 in Denver on Sunday.Dollander (1-0), the team’s first-round pick in 2023, allowed four runs on seven hits and struck out six but was backed by Colorado’s best offensive output of the season.Brenton Doyle finished with three hits, including his first home run, and drove in four runs, Ezequiel Tovar tied his career-high with four hits and Kris Bryant had two hits for the Rockies, who snapped a six-game losing streak.Tyler Soderstrom and Lawrence Butler homered and singled and Miguel Andujar had two hits for the A’s.Dollander retired Butler on the first pitch of his career but Brent Rooker singled and Soderstrom hit a two-out, two-run homer to right, his fourth of the season.The Rockies rallied in the bottom of the first against Joey Estes (0-2). Doyle led off with a homer, Tovar singled and stole second and then Tovar scored on Bryant’s two-out single.Colorado took the lead in the second. Tyler Freeman was hit by a pitch, Mickey Moniak walked and Doyle and Tovar hit consecutive doubles to make it 5-2. Freeman’s sacrifice fly in the third drove in Bryant.Estes allowed six runs on six hits in three innings.