The Padres have designated left-hander Jose Castillo for assignment and optioned righty Matt Waldron to Triple-A El Paso, per a team announcement. That pair of moves clears roster space for righty Robert Suarez, who has been formally reinstated from the 60-day injured list.
Castillo, 27, posted a strong 3.23 ERA through his first 39 big league innings back in 2018-19 but has since seen that promising debut derailed by injury. His 2019 season was cut short by a torn ligament in his hand, and he missed the 2020 season due to a lat strain. Castillo’s 2021 campaign and much of his 2022 season were then wiped out by Tommy John surgery. He’s pitched just two total MLB frames dating back to 2019.
While Castillo posted solid numbers in the upper minors last year as he returned from that deluge of injuries, he’s struggled immensely in 2023. His lone MLB appearance saw him yield four runs in one-third of an inning, and he’s been tagged for a 9.82 ERA in 18 1/3 frames of Triple-A ball.
Castillo is in his final option season and will be arbitration-eligible this winter. The Padres will have a week to trade him, attempt to pass him through outright waivers or release him. If another team picks him up, he can be optioned for the remainder of the season but would need to be carried on the active MLB roster beginning next season. That said, if he can get back on track with a new club, he’d have an additional two seasons of club control remaining.
Suarez, 32, fanned 32% of his opponents and notched a 2.27 ERA as a 31-year-old rookie in San Diego last season after a years-long run of excellence in Japan’s Nippon Professional Baseball. The Friars re-signed to a five-year, $46MM deal with an opt-out clause early last offseason, but he’s yet to pitch this season due to an elbow issue. He’ll give San Diego a high-quality arm to slot into the late innings as the Padres try to salvage an immensely disappointing start to their 2023 season.