The Mariners designated Castano for assignment Tuesday.

EDGE Analysis

Castano failed to make Seattle's Opening Day roster and has now lost his place on the 40-man roster. Despite the DFA, the 27-year-old had a strong start to the campaign at Triple-A Tacoma, allowing one earned run with a 4:1 K:BB across 6.1 innings out of the bullpen.

The Mariners optioned Castano to Triple-A Tacoma on Wednesday.

EDGE Analysis

Castano has yielded five runs with a 3:3 K:BB over five innings in five Cactus League outings. The 27-year-old will likely begin the season in the rotation at Triple-A Tacoma, but if he gets another shot with the big club, it could be as a reliever.

The Mariners optioned Castano to Triple-A Tacoma on Thursday.

EDGE Analysis

Castano joined the Mariners' bullpen after being called up May 23 and made his MLB debut May 28. It was the lone appearance he made as he allowed three earned runs on three hits and two walks across three innings of relief. As part of a corresponding move Thursday, Casey Lawrence was selected from Triple-A Tacoma

The Mariners recalled Castano from Triple-A Tacoma on Friday.

EDGE Analysis

Castano joins the Mariners' bullpen for what will be his MLB debut if he gets into a game. The 26-year-old will likely serve as a multi-inning reliever considering seven of his 10 appearances with Tacoma were starts. Castano has logged a 3.43 ERA and a 28:19 K:BB in 44.2 innings at Triple-A.

The Mariners will recall Castano from Triple-A Tacoma prior to Friday's game in Houston, Francys Romero of BeisbolFR.com reports.

EDGE Analysis

Castano holds a 3.43 ERA and 28:19 K:BB over 44.2 innings and 10 appearances (seven starts) with Tacoma this season. He'll give the Mariners' bullpen some length after the team's relievers covered 4.1 innings in Thursday's loss to the Astros. Castano will be making his major-league debut when he gets into a game.

The Mariners optioned Castano to Triple-A Tacoma on Friday.

EDGE Analysis

Castano was added to the Mariners' 40-man roster in November, but he'll head back to Triple-A to begin 2025 after allowing five runs (four earned) over two innings during spring training. The 26-year-old righty turned in a 5.13 ERA and 1.41 WHIP with the Rainiers last season, and he'll likely need to improve upon those numbers before getting a chance in Seattle's rotation.