The Atlanta Braves selected Beck in the fourth round of the 2018 MLB draft, and traded him to the Giants in 2019.
[1] Though eligible for the 2015 MLB draft and projected to be selected in the first round by Baseball America, Beck decided to fulfill his commitment to attend Stanford, and informed teams that he would not sign.
[16] On July 31, 2019, the Braves traded Beck and Daniel Winkler to the San Francisco Giants in exchange for relief pitcher Mark Melancon.
[17] Beck was assigned to the San Jose Giants, and spent the remainder of the year there, going 3–2 with a 2.27 ERA over six starts, in 35+2⁄3 innings striking out 37 batters.
[16] He was selected to play in the Arizona Fall League for the Scottsdale Scorpions following the 2019 season, and was 1–2 with a 3.63 ERA in 22+1⁄3 innings in which he struck out 23 batters.
[20] Playing for Giants Black, San Jose, and Richmond he was 4–5 with a 6.27 ERA in 12 games (10 starts) in which he pitched 37+1⁄3 innings and struck out 29 batters.
On March 2, 2024, it was announced that Beck would undergo surgery to remove an aneurysm from the upper part of his pitching arm.
[6] His younger brother, Brendan, played college baseball at Stanford, and currently pitches in the New York Yankees organization.