Signed with the Yankees as an international amateur free agent out of the Dominican Republic on July 2, 2019... received $5.1 million to sign, which was all but $300,000 of the Yankees' $5.4 million bonus pool that year and represented a franchise record for an international amateur... was 16-years-old when he signed with the Yankees; previous record for Yankees international player was Dermis Garcia who received $3.2 million in 2014... contract also included $250,000 in potential scholarship money should Dominguez pursue further education... nicknamed "El Marciano" or "The Martian"... trained with Ivan Noboa beginning at 2013 at Noboa's academy in the Dominican Republic... according to ESPN, Dominguez's father Felix, a Yankees fan, named his son in 2003 after former Yankees slugger Jason Giambi, who played for the Yankees from 2002-08 and posted consecutive 41-home run seasons in 2002 and 2003.
Switch-hitter began the 2021 season ranked as the Yankees' No. 1 prospect and the No. 24 prospect in baseball according to MLB.com... became the youngest player to appear in an All-Star Futures Game in July 2021 since Vladimir Guerrero Jr., who was 18-years-old in 2017... homered in his second Futures Game appearance in 2022 at Dodger Stadium... began his Minor League career with the Rookie-level FCL Yankees, going 4-for-20 in the Florida Complex League before getting promoted to Tampa on July 13 after an appearance at the 2021 Futures Game in Denver... posted a .407 on-base percentage with New York's FCL affiliate in 2021... went 0-for-3 in the 2021 Futures Game at Coors Field... Yankees tweeted a video on July 16, 2022 in which they surprised Dominguez with the news of his forthcoming promotion from Tampa to Hudson Valley after the 2022 All-Star break... hit .265 with nine homers, 36 RBIs, 17 doubles, 54 runs and 19 stolen bases in 75 games with Tampa in 2022 before his promotion to High-A... Yankees promoted him to Double-A Somerset on Sept. 13, 2022 after Hudson Valley's season ended... he began 2023 with Somerset
Began the year as the No. 47 overall prospect in baseball according to MLB.com; by August, he had dropped to No. 79 overall and the Yankees' No. 2 prospect... was named Eastern League Player of the Week on 8/21 after a four-hit games on 8/18 and 8/20... after a slow first half (he hit .140 in April, .237 in May, .186 in June) Dominguez began to heat up, batting .294 with 15 RBIs and 30 hits in 24 games for Somerset in July... he was hitting .380 through his first 18 games in August when he captured the league's weekly honors
Moved up two levels from Tampa to Hudson Valley to Somerset, making his Double-A debut in September... combined across three levels, Dominguez hit .273 with 16 homers, 59 RBIs, 37 stolen bases and 92 runs in 120 games, mostly with Tampa... opened the year in Tampa and saw a 69-point jump in his OPS from 2021... ended the year ranked as the Yankees' No. 2 prospect behind Anthony Volpe... was selected to the All-Star Futures Game and homered for the American League team at Dodger Stadium... Yankees promoted him to Hudson Valley after the All-Star break... hit a pair of home runs in the championship-clinching game to help Somerset win the Eastern League crown... was voted an MiLB.com Organization All-Star... Florida State League selected him to its postseason All-Star team and named him the league's top MLB prospect... earned Player of the Week honors with Hudson Valley on Sept. 11... after the Minor League season, the Yankees sent him to Mesa in the Arizona Fall League where he was named an AFL Rising Star... hit .159 with three RBIs and 5 steals in 20 games for Mesa while working with the Yankees top defensive and baserunning coordinator, Jose Javier
Appeared in 56 games, mostly with Tampa, in his first Minor League season after signing with the Yankees in 2019... hit .252 with five homers, 18 RBIs and 9 steals... selected to the All-Star Futures Game in Colorado
Did not play after the MiLB season was wiped out by the Covid-19 pandemic