Giolito’s Return Forces Padres Rotation Shift as Waldron Moves to Bullpen Role

The San Diego Padres are preparing for a significant adjustment to their starting rotation as veteran right-hander Lucas Giolito moves closer to making his 2026 debut with the club. His return is expected to strengthen a rotation already aiming to stay competitive in a tightly contested National League West race.

With Giolito’s activation on the horizon, the Padres must make room in a crowded rotation, forcing the coaching staff to evaluate performance and role fit among its current starters. That process appears to have already produced an early answer regarding who will be moved out of the rotation.

Manager Craig Stammen has indicated that right-hander Matt Waldron is likely to be the pitcher affected by the change. Rather than remaining in the rotation, Waldron is expected to shift into a bullpen role where he can contribute as a long reliever.

The decision reflects both roster necessity and performance considerations, as the Padres aim to maximize pitching depth while integrating Giolito back into the starting group.

1. Giolito’s Return Reshapes Rotation Plans

Lucas Giolito’s return represents a major development for San Diego’s pitching staff, as the veteran brings experience and stability to the rotation. His presence immediately elevates competition for starting roles and forces the Padres to reconfigure their pitching hierarchy. Manager Craig Stammen acknowledged the upcoming adjustment, noting that Giolito’s return would inevitably push one current starter out of the rotation. According to Stammen, that decision has largely centered around role fit and recent performance. Stammen indicated that Waldron is the most likely candidate to shift to the bullpen, where his skill set could be repurposed in shorter or multi-inning relief appearances. The move is designed to maintain roster balance while keeping all arms available in meaningful roles. The decision reflects a common challenge for contending teams: managing depth while accommodating established veterans returning from injury or absence.

2. Waldron Earns Praise Despite Role Change

Even as his role is set to change, Matt Waldron received public praise from Stammen for his recent contributions out of the bullpen. In Thursday’s 7-1 loss to the Milwaukee Brewers, Waldron was called upon to cover the final two innings of the game. Although the outcome was already decided by the time he entered, his effort helped preserve the rest of the bullpen for upcoming games. That preservation of arms is viewed as especially valuable in a long season where pitching depth can be tested over extended stretches. Stammen emphasized the importance of Waldron’s willingness to step into a difficult situation and provide innings when needed. His performance ensured that San Diego would enter its next series with a more rested bullpen. The manager noted that such contributions often go unnoticed in the box score but can play a meaningful role in a team’s ability to remain competitive over time.

3. Struggles as Starter Lead to Role Reevaluation

Waldron’s potential move to the bullpen is also influenced by his struggles in the starting rotation this season. Through five appearances, including three starts, he has posted a 9.28 ERA along with a 1.828 WHIP. Over 21.1 innings pitched, he has recorded 18 strikeouts but has struggled with consistency and run prevention. Those numbers have made it difficult for him to secure a long-term role in the rotation. The Padres view the bullpen as a potential opportunity for Waldron to simplify his approach and focus on shorter outings. Long relief could allow him to leverage his pitch mix without facing lineups multiple times. As San Diego prepares for a critical stretch of the season in the NL West, the organization is prioritizing performance and flexibility. Giolito’s return strengthens the rotation, while Waldron’s shift aims to ensure pitching depth remains intact across all roles.