David Armstrong McKay was born on March 31, 1995, he is an American professional baseball pitcher for the New York Yankees of Major League Baseball. He is 6 feet 3 inches tall. He has previously played in MLB for the Seattle Mariners and Detroit Tigers.
McKay was selected by the Kansas City Royals in the 14th round, 433rd overall, of the 2016 MLB draft. He played for the Burlington Royals in his debut season of 2016, accumulating a 3–3 record with a 2.64 ERA in 44 innings. He split 2017 between the Idaho Falls Chukars and the Lexington Legends, accumulating a 6–5 record with a 7.21 ERA in 88.2 innings.
On January 24, 2019, McKay was invited to major league spring training with the Mariners. McKay was called up to the majors for the first time on March 30, 2019. He was optioned to the Tacoma Rainiers on April 2, without appearing in a game.
He was recalled to the major league roster on May 19 and made his debut on May 20 versus the Texas Rangers. During the 2019 season with Tacoma, McKay posted a 3–1 record, with a 5.15 ERA and 71 strikeouts in 30 appearances. On August 6, 2019, McKay was claimed off waivers by the Detroit Tigers.
He was called up on August 14 and made his Tigers debut the next day against Seattle, the team he made his MLB debut with earlier in the season. In 19+1⁄3 innings, he struck out 29. On September 3, 2020, McKay was designated for assignment by the Tigers following the acquisition of Zack Short.
McKay did not pitch during the 2021 season. On February 26, 2022, McKay signed a minor league deal with the Tampa Bay Rays. On April 4, he was traded to the New York Yankees in exchange for $1.
The Yankees added McKay to their 40-man roster and optioned him to the Scranton/Wilkes-Barre RailRiders. The Yankees promoted McKay to the major leagues on May 22.