Below is a partial list of minor league baseball players in the Seattle Mariners system.

Michael Arroyo (born November 3, 2004) is a Colombian professional baseball infielder in the Seattle Mariners organization.

Arroyo signed with the Seattle Mariners as an international free agent in January 2022.^[1] He made his professional debut that year with the Dominican Summer League Mariners.

Arroyo started 2023 with the Arizona Complex League Mariners before being promoted to the Modesto Nuts. He started 2024 with Modesto for being promoted to the Everett AquaSox.^[2]

• Career statistics and player information from Baseball Reference (Minors)

Taylor Joseph Dollard (born February 17, 1999) is an American professional baseball pitcher in the Seattle Mariners organization.

Dollard attended Crespi Carmelite High School in Encino, Los Angeles, California. As a junior in 2016, he went 2-4 with a 3.38 ERA over 12 appearances, and as a senior in 2017, he went 2-0 with a 1.43 ERA and 42 strikeouts over 29+1⁄3 innings.^[3] He went unselected out of high school in the 2017 Major League Baseball draft, and enrolled at Cal Poly San Luis Obispo to play college baseball.

Dollard made 19 appearance as a freshman at Cal Poly in 2018 and posted a 2.43 ERA. In 2019, his sophomore year, he made 19 relief appearances and went 5-0 with a 2.89 ERA and 48 strikeouts over 43+2⁄3 innings.^[4] After the 2019 season, Dollard played collegiate summer baseball in the Cape Cod Baseball League with for the Yarmouth-Dennis Red Sox.^[5][6] He made four starts in 2020 before the season was cancelled due to the COVID-19 pandemic.^[7] Dollard was selected by the Seattle Mariners in the fifth round of the shortened 2020 Major League Baseball draft with the 137th overall selection.^[8] He signed for $406,000.^[9]

Dollard made his professional debut in 2021 with the Modesto Nuts and was promoted to the Everett AquaSox during the season.^[10] Over 19 games (18 starts) between the two teams, he went 9-4 with a 5.14 ERA and 133 strikeouts over 105 innings. He played the 2022 season with the Arkansas Travelers.^[11] Over 27 starts, he went 16-2 with a 2.25 ERA and 131 strikeouts over 144 innings.^[12] He led the minor leagues in wins.^[13]

To open the 2023 season, he was assigned to the Tacoma Rainiers.^[14] Dollard made only three starts for Tacoma, logging a 7.56 ERA across 8+1⁄3 innings, before he was placed on the injured list with a shoulder impingement on April 26.^[15] On June 27, it was announced that Dollard would undergo labrum surgery and miss the remainder of the season.^[16] Dollard was assigned to Tacoma to open the 2024 season, but made only three appearances before being placed on the injured list.^[17]

• Career statistics and player information from Baseball Reference (Minors)

Jonathan Thomas Farmelo (born September 9, 2004) is an American professional baseball outfielder in the Seattle Mariners organization.

Farmelo attended Westfield High School in Fairfax County, Virginia.^[18] In his high school career, he recorded a .385 batting average, seven home runs, and 29 RBI's, in 48 career games.^[19] As a senior, Farmelo batted .478.^[20] Farmelo was committed to play college baseball at the University of Virginia.^[21]

Farmelo was selected 29th overall by the Seattle Mariners in the 2023 Major League Baseball draft. He signed with the Mariners on July 17, 2023 for an over-slot bonus of $3,200,000.^[22][23] He joined the roster of the Modesto Nuts, Single-A affiliate of the Mariners, for the 2023 play-offs and played as an outfielder.^[24]

• Career statistics and player information from Baseball Reference (Minors)

Logan Scott Gragg (born August 8, 1998) is an American professional baseball pitcher in the Seattle Mariners organization.

Gragg attended Prairie Grove High School in his hometown of Prairie Grove, Arkansas and later committed playing college baseball at Connors State College and spent 2 seasons there before transferring over to Oklahoma State University before being selected in the eighth round by the St. Louis Cardinals in the 2019 Major League Baseball draft and later signed.^[25] Gragg had a solid couple of years in the cardinals organization. racking up a ERA of 4.65 with 323 strike outs & a win-loss record of 13-22 with something he calls The Farmhand. He was gonna start the 2024 season with the Springfield Cardinals, but didn't make cut and was released on March 20, 2024.^[26]

On March 28, 2024, Gragg and the Seattle Mariners agreed to a deal & made his 2024 season debut with the Arkansas Travelers.^[27]

• Career statistics and player information from Baseball Reference (Minors)

Lázaro Yosmel Montes (born October 22, 2004) is a Cuban professional baseball outfielder in the Seattle Mariners organization.

Montes signed with the Seattle Mariners as an international free agent in January 2022.^[28] He made his professional debut that year with the Dominican Summer League Mariners.

Montes started 2023 with the Arizona Complex League Mariners before being promoted to the Modesto Nuts.^[29]

• Career statistics and player information from MLB, or ESPN, or Fangraphs, or Baseball Reference (Minors)

Michael Paul Morales (born August 13, 2002) is an American professional baseball pitcher in the Seattle Mariners organization.

Morales attended East Pennsboro High School in East Pennsboro Township, Pennsylvania.^[30] He was selected by the Seattle Mariners in the third round of the 2021 Major League Baseball draft.^[31]

Morales made professional in 2021 with the Arizona Complex League Mariners. He pitched 2022 and 2023 with the Modesto Nuts. He started 2024 with the Everett Aquasox before being promoted to the Arkansas Travelers.^[32]

• Career statistics and player information from Baseball Reference (Minors)

Tai Jordan Peete (born August 11, 2005) is an American professional baseball third baseman in the Seattle Mariners organization.

Peete grew up in Tyrone, Georgia and attended Trinity Christian School.^[33] As a junior, he racked up an average of .400 with 4 home runs, 5 doubles, a triples & 12 RBIs.^[34] But prior to that however, he represented the Southeast Region team in the 2018 Little League World Series and batted .409.^[35] He was named the 2023 Region 4-4A Player of the Year & 2023 Rawlings-Perfect Game Preseason All-Region First Team (Southeast) after his senior year when he batted .444 with 12 home runs, 7 doubles, 4 triples & 36 RBIs.^[36] Peete has committed to play baseball at Georgia Tech.^[37]

Peete was selected by the Seattle Mariners in the Competitive Balance A Round, with the 30th overall selection, of the 2023 Major League Baseball draft.^[38] On July 18, 2023, He signed with The Mariners to an over slot deal worth $2.5 million.^[39] Peete started his professional career the same month with the ACL Mariners by playing 10 games and recorded with a batting average of .351 with 13 high & 6 RBIs.^[40] Later in the season, he was sent up to the Modesto Nuts & contributed with an batting average of .242 with 15 hits and 14 RBIs, including his first 2 home runs of his career. Both of which, resulted in grand slams.^[41]

• Career statistics and player information from Baseball Reference (Minors)

Cole William Phillips (born May 26, 2003) is an American professional baseball pitcher for the Seattle Mariners organization.

Cole attended Boerne High School in Boerne, Texas.^[42] The Atlanta Braves selected Phillips in the second round of the 2022 MLB draft.^[43]

On December 3, 2023, the Braves traded Phillips and Jackson Kowar to the Seattle Mariners for Jarred Kelenic, Marco Gonzales, and Evan White.^[44] However, prior to the 2024 season, he underwent Tommy John surgery, ending his season before it began.^[45]

• Career statistics and player information from Baseball Reference (Minors)

Kaden James Polcovich (born February 21, 1999) is an American professional baseball second baseman in the Seattle Mariners organization.

Polcovich attended Deer Creek High School in Edmond, Oklahoma. After his junior year 2016 in which he batted .321 with 26 RBIs, he committed to play college baseball at the University of Kentucky.^[46] Polcovich went unselected in the 2017 Major League Baseball draft, and enrolled at Kentucky.

Polcovich was dismissed from the Kentucky baseball team during the first semester of his freshman year, and thus did not make an appearance for them.^[47][48] He left Kentucky, and then enrolled at Northwest Florida State College where he hit .280 with three home runs, 18 RBIs, and 13 stolen bases over forty games as a freshman in 2018 while then batting .273 with 12 home runs and 38 RBIs over 53 games as a sophomore in 2019.^[49] After his sophomore year in 2019, he played collegiate summer baseball with the Chatham Anglers of the Cape Cod Baseball League and was named a league all-star.^[50][51][52] He also transferred to Oklahoma State University.^[53] As a junior at Oklahoma State in 2020, he batted .344 with two home runs over 21 games before the season was cancelled due to the COVID-19 pandemic.^[54] He was selected by the Seattle Mariners in the third round (78th overall) of the 2020 Major League Baseball draft and signed.^[55][56][57]

Polcovich made his professional debut in 2021 with the Everett AquaSox of the High-A West with whom he batted .271/.415/.505 with ten home runs, 47 RBIs, and 16 stolen bases over 58 games.^[58] He was promoted to the Arkansas Travelers of the Double-A South in late July, slashing .133/.242/.211 with two home runs, 14 RBIs, and four doubles over 36 games to end the season.^[59] He returned to Arkansas for the 2022 season.^[60] Over 118 games, he batted .242/.345/.386 with 12 home runs, sixty RBIs, and 18 stolen bases.^[61]

Polcovich's father, Kevin played in Major League Baseball for the Pittsburgh Pirates in 1997 and 1998.^[62]

• Career statistics and player information from Baseball Reference (Minors)

Alberto Rodríguez (born October 6, 2000) is a Dominican Republic professional baseball outfielder for the Seattle Mariners of Major League Baseball.

Rodríguez signed with the Toronto Blue Jays as an international free agent in 2017. After the 2020 season, the Blue Jays traded Rodríguez to the Seattle Mariners as the player to be named later in the trade for Taijuan Walker after the 2020 season.^[63][64]

On November 18, 2021, the Mariners added Rodríguez to their 40-man roster to protect him from the Rule 5 draft.^[65] In 2022, Rodríguez appeared in 119 games for the High-A Everett AquaSox, slashing .261/.336/.396 with 10 home runs and 46 RBI.

On January 17, 2023, Rodríguez was designated for assignment by Seattle following the acquisition of J. B. Bukauskas.^[66] On January 24, Rodríguez cleared waivers and was sent outright to High-A Everett.^[67]

• Career statistics and player information from Baseball Reference (Minors)

Benjamin Andrew Williamson (born November 5, 2000) is an American professional baseball third baseman in the Seattle Mariners organization.

In Williamson's career he made First Team All-CAA three times (2021–2023), in the process becoming the first player in William & Mary's history to be named to the CAA's First Team for three straight years.^[68] He also won the CAA Defensive Player of the Year in 2022 after having a .975 fielding percentage.^[69] The 2023 season was the best for Williamson where he had a .391 batting average, and a .513 on base percentage, slugging 12 home runs, and 49 RBI's, while also stealing 14 bases.^[70] For his performance on the year he was named CAA Player of the Year.^[71] In 2023, he played collegiate summer baseball with the Hyannis Harbor Hawks of the Cape Cod Baseball League.^[72]

Williamson was selected by the Seattle Mariners in the second round, with the 57th overall selection, of the 2023 Major League Baseball draft.^[73][74] On July 14, 2023, Williamson signed with the Mariners for an under slot deal worth $600,000.^[75]

• Career statistics and player information from Baseball Reference (Minors)