The Mariners outrighted Diaz to Triple-A Tacoma on Wednesday.

EDGE Analysis

Diaz was removed from the Mariners' 40-man roster last week but will remain in the organization after passing through waivers unclaimed. The left-hander has collected a 4.66 ERA and 33:27 K:BB over 46.1 frames covering parts of five seasons at the major-league level.

The Mariners designated Diaz for assignment Friday, Adam Jude of The Seattle Times reports.

EDGE Analysis

With Cooper Criswell coming over from the Mets in a trade, Diaz will give up his place on the Mariners' 40-man roster. The 29-year-old southpaw made just one appearance with the Mariners near the start of the 2025 regular season, during which he gave up one hit and struck out one batter over 1.1 innings. He spent the rest of the season at Triple-A Tacoma and turned in a 4.15 ERA and 1.32 WHIP across 138.2 frames.

The Mariners optioned Diaz to Triple-A Tacoma on Tuesday.

EDGE Analysis

Diaz didn't appear in a game after being recalled from the minors last week, and he'll now be sent back down in favor of Casey Lawrence. The 28-year-old Diaz has turned in a 5.87 ERA and 1.49 WHIP across 30.2 innings at Tacoma.

The Mariners recalled Diaz from Triple-A Tacoma on Wednesday.

EDGE Analysis

Diaz will link up with the big club for the second time this season, after he previously made a 1.1-inning relief appearance April 1 against the Tigers before being demoted a day later. Since then, Diaz has been getting stretched out a starter at Tacoma and had produced a 5.87 ERA, 1.49 WHIP and 27:10 K:BB over 30.2 innings. Diaz could be available in relief for Wednesday's game against the Yankees, but if he ends up going unused, he might be an option to make a spot start this weekend in San Diego. The Mariners have an opening in the rotation after Bryce Miller (elbow) was placed on the 15-day injured list in a corresponding move.

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

EDGE Analysis

Diaz made his one appearance for Seattle on Tuesday. He allowed no runs on one hit with a strikeout in 1.1 innings. The southpaw has made the bulk of his appearances for Tacoma as a starter and figured to get a shot at securing a rotation spot in place of the injured George Kirby (shoulder). After just one relief appearance, he will return to Tacoma. In a corresponding move, Luis F. Castillo is expected to be promoted from Triple-A Tacoma to make his first career start Friday.

The Mariners selected Diaz from Triple-A Tacoma on Tuesday.

EDGE Analysis

Diaz's selection now makes Seattle's roster full at 40 players. He was beaten out by Emerson Hancock in spring training for a role in the starting rotation. With Hancock optioned to Triple-A Tacoma in a corresponding move Tuesday, Diaz will get a chance in the rotation.

The Mariners reassigned Diaz to minor-league camp Monday.

EDGE Analysis

Diaz has been getting stretched out as a starter during spring training, but he wasn't in contention for a spot in Seattle's Opening Day rotation, even with the Mariners set to begin the campaign without George Kirby (shoulder). Emerson Hancock is expected to get the first crack at replacing Kirby, but Diaz could be among the next pitchers in line to make spot starts if the Mariners lose another rotation member to an injury. Diaz will continue to make regular turns through the rotation at Triple-A Tacoma until he might be needed by the big club.

Diaz agreed Wednesday with the Mariners on a minor-league contract that includes an invitation to spring training, Ryan Divish of The Seattle Times reports.

EDGE Analysis

Seattle removed Diaz from its 40-man roster earlier this month, and after he elected free agency upon clearing waivers, the 28-year-old will now rejoin the Mariners for the start of spring training. He'll presumably get the opportunity to compete for a spot in the Opening Day bullpen as a long reliever. The Mariners boast a talented rotation that has all five members healthy heading into spring training, but Diaz's prior big-league starting experience could put him high on the list for spot starts if injuries in the rotation stack up at any point. He made five appearances (one start) for Seattle in 2024, covering 9.2 innings and allowing five earned runs on 14 hits and three walks while striking out eight.

Diaz cleared waivers Friday and elected to become a free agent.

EDGE Analysis

Diaz ended up as the Mariners' roster casualty following the acquisition of Casey Legumina. After going unclaimed off waivers, Diaz will now exercise his right to leave the organization and explore his other options. The 28-year-old righty owns a 4.80 ERA and 1.73 WHIP across 45 career MLB innings.

The Mariners designated Diaz for assignment Monday.

EDGE Analysis

The transaction clears a spot on the 40-man roster for the addition of Casey Legumina. Diaz, 28, has been unimpressive over parts of four big-league seasons, compiling a 4.80 ERA and 32:27 K:BB across 45 innings. He should stand a good chance of passing through waivers unclaimed.