Selected in the 15th round of the 2022 MLB Draft by the Chicago White Sox out of Duke... signed with the White Sox on July 25, 2022 for $100,000... made his Chicago debut in 2022 with the team's Arizona Complex League affiliate (3 games) and with Class A Kannapolis... spent all of 2023 with Kannapolis... prior to pitching at Duke, he attended St. Sebastian's School... in two seasons at Duke from 2021-22, he went 6-5 with a 6.55 ERA and 89 strikeouts in 68 2/3 innings as a starter... did not pitch in 2020 due to the Covid-19 pandemic... was ranked as the second-best right-handed pitcher in the state of Massachusetts according to Perfect Game USA when he was with St. Sebastian's in Wellesley, Mass... in high school, he won all seven of his starts in his junior season and earned both Independent School League (ISL) Most Valuable Player and Most Valuable Pitcher honors... also competed in football, lettering all four years as a quarterback... was a member of the National Honor Society and received academic honors with distinction every semester of his time at St. Sebastian’s... full name is William Randall Seidl... son of Randall and Janet Seidl; he has has two brothers, Tommy and Philip, and one sister, Shannon... his brother Tommy played baseball at Harvard from 2018-2020 and for Alabama from 2022-2023 before signing with the independent Capitales de Québec of the Frontier League, where he appeared in 35 games in 2023... Billy became engaged to Brielle Biermann in February 2024; Biermann stared in the Bravo reality television series Don't Be Tardy, a spinoff of The Real Housewives of Atlanta which featured her parents, Kim Zolciak and former NFL linebacker Kroy Biermann