Brandon Pfaadt: Everything you need to know

Pfaadt allowed two hits and struck out five over three scoreless innings of relief in Tuesday's 7-4 loss to Texas. Starter Zac Gallen was done early after giving up seven runs in 4.2 innings. That meant Pfaadt, a starter turned reliever, could bail out the bullpen with multiple innings. He struck out five of the 11 batters faced in what was his best effort of the season. Pfaadt entered the game with a 9.95 ERA over his first three relief appearances. The Diamondbacks will make every effort to keep him stretched out in case a fill-in or piggy-back starter is required.

Pfaadt allowed one run on four hits and two walks while striking out three over 6.1 innings in Sunday's 10-4 loss to Toronto. The results met the definition of a quality start, but Sunday's appearance was Pfaadt's first as a member of the Diamondbacks' bullpen. He gave the club exactly what it needed after starter Ryne Nelson allowed eight runs and retired just one batter. Prior to joining the 'pen, Pfaadt compiled a 5.94 ERA in three starts and was replaced by Merrill Kelly in the rotation.

Pfaadt will transition to the bullpen following the return of Merrill Kelly (back) from the injured list, Jody Jackson of Bally Sports Arizona reports. Pfaadt has struggled mightily to find his footing over his first three starts of the 2026 campaign, as he's given up 11 runs over 16.2 innings of work. He'll search for success as a reliever while Michael Soroka will remain in Arizona's starting rotation going forward.