Alejandro Kirk was born on November 6, 1998, in Tijuana, Mexico. He is a catcher in the MLB.
Kirk began playing baseball at three years of age. His little league team was coached by his father.
Kirk was signed by the Blue Jays as an international free agent in 2016, and made his professional debut with the Rookie-level Gulf Coast League Blue Jays in 2017, appearing in one game. He played the entire 2018 season with the Rookie Advanced Bluefield Blue Jays, and recorded a .354 batting average with 10 home runs and 57 runs batted in (RBI) in 58 games. Kirk also walked more than he struck out, finishing the season with 33 and 21 respectively. He was promoted to the Class-A Lansing Lugnuts to begin the 2019 season, and later earned a promotion to the Advanced-A Dunedin Blue Jays, where he finished the year. In 92 total games played, Kirk hit .290 with seven home runs, 44 RBI, and 56 walks against just 39 strikeouts. On February 7, 2020, the Blue Jays invited Kirk to spring training.
Kirk was expected to begin the 2020 minor league season with the Double-A New Hampshire Fisher Cats, however the season was delayed and ultimately cancelled by the COVID-19 pandemic. He was added to the team's taxi squad on September 1, 2020. On September 11, Kirk was called up by the Blue Jays. He made his debut the following night, and recorded his first MLB hit. On September 21, 2020, he recorded four hits and his first home run in the majors. He also became the first catcher 21 or younger to hit four hits in a game since Joe Mauer in 2004. Overall with the 2020 Blue Jays, Kirk batted .375 with one home run and 3 RBIs in 9 games.
On July 8, 2022, Kirk was named an All-Star for the first time in his career, along with teammate Vladimir Guerrero Jr. Kirk finished the 2022 season batting .285 with 14 home runs and 63 RBI. On November 10, he was announced as the winner of the Silver Slugger award at catcher for the American League.