D-Backs Move Brandon Pfaadt To Bullpen

The Diamondbacks are moving Brandon Pfaadt to the bullpen, relays José M. Romero of The Arizona Republic. Merrill Kelly will be activated from the 15-day injured list to start tomorrow’s game in Baltimore.

This was the expectation. Zac Gallen, Eduardo Rodriguez and Ryne Nelson are locked into the rotation. Manager Torey Lovullo said last week that the Snakes were not considering a six-man group. Entering the season, the plan was probably for Michael Soroka to slide to long relief once Kelly was ready to go.

However, Soroka has looked very sharp in his first three starts as a Diamondback. The righty has struck out 23 of 67 batters faced (34.3%) while allowing just five runs through 15 2/3 frames. He has completed at least five innings in all three appearances, all of which the D-Backs have won.

Pfaadt has had a much shakier start to the season. The righty has allowed 12 runs (11 earned) over 16 2/3 innings. He has punched out 11 while walking six batters and surrendering three home runs. If Pfaadt were coming off a strong 2025 season, the Diamondbacks probably would have given him a longer leash. He struggled to a 5.25 earned run average with a modest 19.2% strikeout rate a season ago. Pfaadt pounds the strike zone but has battled home run issues throughout his three-plus years in the big leagues.

The Diamondbacks could have optioned him to keep him stretched out as a starter. Their Triple-A affiliate in Reno plays in an exceedingly hitter-friendly environment, so that may not have been a great setting to get him on track.

Arizona could also use any help they can get in one of the league’s weakest bullpens. Their relief corps entered play Monday with a 4.50 ERA that ranked 21st in MLB. That doesn’t include tonight’s disastrous performance. The trio of Taylor Rashi (who was immediately optioned after the game), Jonathan Loáisiga, and Andrew Hoffmann gave up seven runs and an inherited runner across 2 2/3 innings in relief of Nelson. They squandered a 7-1 lead and dropped the series opener against the Orioles by a 9-7 score.

Pfaadt could immediately draw some high-leverage assignments. The D-Backs will presumably give him another rotation opportunity at some point. He’s in the first season of the five-year, $45MM extension he signed on the eve of the 2025 season. A short-term bullpen stint might allow him to simplify his arsenal. Pfaadt has thrown six pitches at least 10% of the time, including a marked uptick in his curveball use compared to last season.

Kelly made one rehab start for Reno and pitched a game at extended spring training on Thursday. That was evidently all the ramp-up he needed from his season-opening injured list stint. Kelly was diagnosed with intercostal nerve irritation early in Spring Training. He was able to pitch by the end of camp but needed a couple extra weeks to build his arm. The injury robbed Kelly of what would have been his first career Opening Day start but didn’t wound up being all that significant overall, especially with Soroka stepping up to seize the open rotation spot.