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Mariners call up Lazaro Montes, activate Cooper Criswell from injured list

Lazaro Montes made his MLB debut for the Seattle Mariners on Tuesday, hitting a home run and an RBI single against the Red Sox at Fenway Park. The Mariners also activated reliever Cooper Criswell from the 60-day injured listahead of their series in Boston.

By Tertius News AI Desk 2 distinct · 2 mastheads · 2 articles Version 1 Coverage Sep 1–2, 2026 Published 1h ago

Mariners promote power prospect Lazaro Montes

The Seattle Mariners called up slugging prospect Lazaro Montes, who made his MLB debut on Tuesday night against the Boston Red Sox at Fenway Park. The 21-year-old Cuban lefty batted wearing jersey number 99, the same number worn by Yankees slugger Aaron Judge. Montes delivered an RBI hit earlier in the game before launching a home run out of Fenway Park, according to Heavy. It was the seventh home run in a Mariners MLB debut in franchise history, per a graphic shared by the team, joining Jamie Nelson (1983),, Alvin Davis (1984(, Greg Dobbs)(2004(, Kenji Johjima)(2006(, and Kyle Lewis)(2019(.

Montes also became the first Mariners player with a multi–hit MLB debut since 2001, when Ichiro Suzuki did it in his first regular season game after arriving from Japan, as reported by MLB stats researcher Sarah Langs on X. Langs also noted he was the third player in Seattle history with multiple hits and multiple RBI in his debut, after Shane Monahan ( 1998( and Al Chambers( 1983(.

Montes came into the season rated the Mariners' No.. 5 prospect,and MLB Pipeline's No.. 56 overall prospect, per MLB News. Fangraphs ranked him the No.. 81 prospect in MLB prior to his call–up, listing his raw power potential as a 70–grade out of 80, already playing as a 65–grade, with a game power grade of just 40 but the potential for a 60, according to Heavy. His debut showed he can access that raw power in a big league game.

Criswell returns from 60–day injured list

Before the series, the Mariners activated reliever Cooper Criswell from the 60–day injured list. Criswell had been sidelined since June 9 with a right shoulder strain, per MLB News. He pitched in three rehab assignment outings, all with Triple–A Tacoma, themost recent coming on Friday when he recorded four outs on 15 he'd been pitching every third day, which should make him immediately available, the report said.

“It's been kind of like Spring Training,” Criswell said, per MLB News. “It takes some time. Being shut down for so long, it took a little bit of time to build back up, just to get the arm in game shape.”

In corresponding roster moves, reliever Nick Davila was placed on the 15–day injured list with a SC joint sprain, and rookie shortstop Colt Emerson was transferred to the 60–day injured list. Manager Dan Wilson said Criswell's versatility in the bullpen would help him ease back.

“It'll take a minute for him to get back and comfortable, and he's had his rehab outings,” Wilson said, per MLB News. “But I think the thing about Cris is his versatility in the ‘pen.”

Criswell was stretched out as a starter early in Spring Training before transitioning to the bullpen near the end of camp, the report noted.

Roster moves and upcoming schedule

Montes was expected to join the Mariners within the next 24 hours, and manager Dan Wilson said that Montes would be added to the roster the next day, per MLB News. Patrick Sandoval was scheduled to start for the Red Sox on Wednesday. The Mariners opened the three–game series at Fenway Park on Monday.

How each outlet told it

A framing line is our reading of that outlet's own text — an interpretation, not a quotation and not a fact we assert. Check it against what the outlet published.

Heavy.

Framing: The headline emphasizes that Lazaro Montes made history in his MLB debut. — Celebratory and admiring

as of Sep 2, 2026, 5:16 AM UTC

Facts Included:

Lazaro Montes made his MLB debut for the Seattle Mariners wearing jersey number 99.
Aaron Judge of the New York Yankees also wears number 99.
Montes hit a home run in his MLB debut on Tuesday night for Seattle, putting him on a short list in Mariners history.
Montes delivered an RBI hit earlier in the game before launching the home run out of Fenway Park.
The lefty is known for his raw power, and he showed it there.
Montes is the seventh player in Mariners history to hit a home run in his MLB debut, according to a graphic shared by the team.
Jamie Nelson did it first, in 1983.
Alvin Davis followed the very next year.
In 2004, Greg Dobbs joined the club.
The catcher Kenji Johjima added his name to the list in 2006.
The promising Kyle Lewis did it in 2019.
Sarah Langs shared a couple of gems on X on Tuesday night after Montes’ successful debut.
Montes is the first Mariners player with a multi-hit MLB debut since 2001 — when Ichiro Suzuki did it in his first MLB regular season game after arriving from Japan.
Montes is also the third player in Seattle franchise history, per Langs, with multiple hits and multiple RBIin his debut.
The others were Shane Monahan in 1998 and Al Chambers in 1983.
Montes was ranked the No. 81 prospect in MLB by Fangraphs prior to his call-up.
His calling card is his power.
Fangraphs listed his raw power potential as a 70-grade out of 80, with it already playing as a 65-grade at this very moment.
Montes hasn’t always translated that to games, listed with a game power grade of just 40, with the potential for ̂ 60.
Montes showed he can access that raw power in a big league game.
The Mariners will be very happy to have the 21-year old Cuban up in the major leagues.

Read the source article →

MLB News

Framing: The headline emphasizes the return of Cooper Criswell to the Mariners and the upcoming addition of Lazaro Montes.

as of Sep 1, 2026, 12:47 AM UTC

Facts Included:

Cooper Criswell was activated from the 60-day injured list.
Lazaro Montes was expected to join the Mariners within the next 24 hours.
Nick Davila was placed on the 15-day IL with a SC joint sprain.
Colt Emerson was transferred to the 60-day IL.
Criswell pitched in three rehab assignment outings, all with Triple-A Tacoma.
Montes was ranked the Mariners’ No. 5 prospect and MLB Pipeline’s No. 56 overall.
Manager Dan Wilson said that Montes would be added to the roster tomorrow.
Patrick Sandoval was scheduled to start for the Red Sox on Wednesday.

Read the source article →

What was claimed, and who backed it

AI-extracted; can misattribute a claim — see Methodology.

Each row is one claim, attributed to the outlet whose wording states it most clearly. Confidence rates how directly the source text states the claim — explicit and unhedged rates high; hedged, pieced-together, or internally inconsistent statements rate lower. It does not measure whether the claim is true. Status is Contested when two claims on this page negate each other; otherwise it counts the distinct outlets we found asserting that specific claim — so a single-source claim can still show high confidence, and a multi-source claim can show medium. Every one of those outlets is named beside the status, so you can check the count against the list. For claims extracted before we began storing that list, the row says so: it names the outlet the claim is quoted from and states that we have not recorded which outlets backed it. Outlets wrote at different times, so a figure that evolves — a casualty count, for example — can legitimately differ between rows; check the "as of" time next to each claim's source.

Claim	Confidence	Status
ClaimLazaro Montes made his MLB debut for the Seattle Mariners wearing jersey number 99.	ConfidenceHigh	StatusSingle-source via Heavy. as of Sep 2, 2026, 5:16 AM UTC
ClaimAaron Judge of the New York Yankees also wears jersey number 99.	ConfidenceHigh	StatusSingle-source via Heavy. as of Sep 2, 2026, 5:16 AM UTC
ClaimMontes hit a home run in his MLB debut on Tuesday night for Seattle.	ConfidenceHigh	StatusSingle-source via Heavy. as of Sep 2, 2026, 5:16 AM UTC
ClaimMontes delivered an RBI hit earlier in the game before launching a home run out of Fenway Park.	ConfidenceHigh	StatusSingle-source via Heavy. as of Sep 2, 2026, 5:16 AM UTC
ClaimMontes is the seventh player in Mariners history to hit a home run in his MLB debut, according to a graphic shared by the team.	ConfidenceMedium	StatusSingle-source via Heavy. as of Sep 2, 2026, 5:16 AM UTC
ClaimJamie Nelson hit a home run in his MLB debut for the Mariners in 1983.	ConfidenceHigh	StatusSingle-source via Heavy. as of Sep 2, 2026, 5:16 AM UTC
ClaimAlvin Davis hit a home run in his MLB debut for the Mariners in 1984.	ConfidenceHigh	StatusSingle-source via Heavy. as of Sep 2, 2026, 5:16 AM UTC
ClaimGreg Dobbs hit a home run in his MLB debut for the Mariners in 2004.	ConfidenceHigh	StatusSingle-source via Heavy. as of Sep 2, 2026, 5:16 AM UTC
ClaimKenji Johjima hit a home run in his MLB debut for the Mariners in 2006.	ConfidenceHigh	StatusSingle-source via Heavy. as of Sep 2, 2026, 5:16 AM UTC
ClaimKyle Lewis hit a home run in his MLB debut for the Mariners in 2019.	ConfidenceHigh	StatusSingle-source via Heavy. as of Sep 2, 2026, 5:16 AM UTC
ClaimMontes is the first Mariners player with a multi-hit MLB debut since 2001, when Ichiro Suzuki did it in his first MLB regular season game after arriving from Japan.	ConfidenceMedium	StatusSingle-source via Heavy. as of Sep 2, 2026, 5:16 AM UTC
ClaimMontes is the third player in Seattle franchise history with multiple hits and multiple RBI in his MLB debut.	ConfidenceMedium	StatusSingle-source via Heavy. as of Sep 2, 2026, 5:16 AM UTC
ClaimThe others to hit multiple hits and multiple RBI in their MLB debuts for Seattle were Shane Monahan in 1998 and Al Chambers in 1983.	ConfidenceHigh	StatusSingle-source via Heavy. as of Sep 2, 2026, 5:16 AM UTC
ClaimMontes was ranked the No. 81 prospect in MLB by Fangraphs prior to his call-up.	ConfidenceHigh	StatusSingle-source via Heavy. as of Sep 2, 2026, 5:16 AM UTC
ClaimFangraphs listed his raw power potential as a 70-grade out of 80, with it already playing as a 65-grade at this very moment.	ConfidenceMedium	StatusSingle-source via Heavy. as of Sep 2, 2026, 5:16 AM UTC
ClaimFangraphs listed his game power grade of just 40, with the potential for ̂ 60.	ConfidenceMedium	StatusSingle-source via Heavy. as of Sep 2, 2026, 5:16 AM UTC
ClaimMontes showed he can access raw power in a big league game.	ConfidenceHigh	StatusSingle-source via Heavy. as of Sep 2, 2026, 5:16 AM UTC
ClaimCooper Criswell was activated from the 60-day injured list by the Seattle Mariners.	ConfidenceHigh	StatusSingle-source via MLB News as of Sep 1, 2026, 12:47 AM UTC
ClaimLazaro Montes was expected to join the Mariners within the next 24 hours.	ConfidenceMedium	StatusSingle-source via MLB News as of Sep 1, 2026, 12:47 AM UTC
ClaimNick Davila was placed on the 15-day IL with a SC joint sprain.	ConfidenceMedium	StatusSingle-source via MLB News as of Sep 1, 2026, 12:47 AM UTC
ClaimColt Emerson was transferred to the 60-day IL.	ConfidenceHigh	StatusSingle-source via MLB News as of Sep 1, 2026, 12:47 AM UTC
ClaimCriswell pitched in three rehab assignment outings, all with Triple-A Tacoma.	ConfidenceHigh	StatusSingle-source via MLB News as of Sep 1, 2026, 12:47 AM UTC
ClaimMontes was ranked the Mariners’ No. 5 prospect and MLB Pipeline’s No. 56 overall.	ConfidenceHigh	StatusSingle-source via MLB News as of Sep 1, 2026, 12:47 AM UTC
ClaimManager Dan Wilson said that Montes would be added to the roster tomorrow.	ConfidenceHigh	StatusSingle-source via MLB News as of Sep 1, 2026, 12:47 AM UTC
ClaimPatrick Sandoval was scheduled to start for the Red Sox on Wednesday.	ConfidenceHigh	StatusSingle-source via MLB News as of Sep 1, 2026, 12:47 AM UTC

Transparency & Audit Trail

2 distinct · 2 mastheads · 2 articles consulted: Heavy., MLB News 25 claims extracted Version 1 Written 2026-09-02