Gregory Wyatt Mills
- Bats Right, Throws Right
- Height 6' 3", Weight 175 lb.
- School Gonzaga University
- High School Gonzaga Prep High School
- Debut May 1, 2021
Wyatt Mills has pitched for Team USA before making his major league debut in 2021.
Mills had a 3.65 ERA as a college freshman then was 1-0 with two saves and a 2.79 ERA as a sophomore. His junior year at Gonzaga, he was 3-2 with 7 saves, a 2.65 ERA and 38 K in 37 1/3 IP. The Tampa Bay Rays took him in the 16th round of the 2016 amateur draft but he did not sign. Returning for his senior year, he improved to 2-2, 1.79 with 12 saves, second in the West Coast Conference (one behind Troy Conyers). His 21 career saves were 2nd in school history, 6 shy of Cody Martin's record. 
The Seattle Mariners chose him in the third round of the 2017 amateur draft, the 93rd overall selection. He was the first college pitcher they took that year after college batter Evan White and high school hurler Sam Carlson. The scout was Jeff Sakamoto.  He was sharp that summer for the Everett AquaSox (0-1, 2 Sv, 2.57 ERA in 7 G) and Clinton LumberKings (0-1, 4 Sv, 1.35 in 11 G), fanning 29 and allowing only 8 hits in 20 1/3 innings.
In 2018, Mills split time between the Modesto Nuts (6-0, 11 Sv, 1.91 ERA, .90 WHIP, 49 K in 42 1/3 IP) and Arkansas Travelers (0-2, 10.13 in 9 G). Among Mariners farmhands, only Shawn Armstrong pitched more games than his 44 and only Matt Festa and Armstrong had more saves. He was 1-0 with a 1.93 ERA for the Peoria Javelinas in the Arizona Fall League. For 2019, he was 4-2 with 8 saves and a 4.27 ERA in 41 games for Arkansas, striking out 66 in 52 2/3 innings. He tied for 8th in the Texas League in appearances.
He then was picked for the US team for the 2019 Premier 12. His first appearance was his best and came at a key time. With the US facing potential elimination in a must-win game against the Dominican national team, he relieved Brian Flynn in the 6th with a 9-7 lead in what had been a slugfest. He quieted the Dominicans with ease, retiring all six batters he faced (Edwin Espinal, Gilberto Celestino, Geraldo Perdomo, Otto López, Alfredo Marte and Carlos Peguero, two of them via strikeout, and would get the win for the US. Noah Song and Brandon Dickson closed out what would be a 10-8 victory. He struggled his next two outings, giving up two runs in 2/3 IP against South Korea and 3 hits in 1/3 IP but no runs versus Australia. His last two appearances were brief, one batter each. He retired Hung-Yu Lin of Taiwan. In the Bronze Medal Game against Mexico, with the winner clinching a spot in the 2020 Olympics, he relieved Daniel Tillo with two outs in the 7th and a 1-1 tie and got Alí Solís on a fly. Clayton Andrews replaced him in the 8th and the US would go on to lose in extra innings. His five appearances tied 11 other hurlers for the event lead, including teammates Song and Andrews. 
The 2020 minor league season was cancelled by the COVID-19 pandemic, and the start of the 2021 minor league season was delayed. As a result, he did not see game action again until the Mariners called him up when Jacob Nottingham was designated for assignment. He debuted May 1, 2021, relieving Keynan Middleton with a 10-1 deficit in the 8th against the Angels. He retired José Iglesias, Max Stassi and David Fletcher in order, then was replaced by Domingo Tapia for the 9th.