Selected in the 1st round (No. 21 overall) of the 2020 MLB Draft by the St. Louis Cardinals out of Decatur High School in Stone Mountain, Georgia... signed with the Cardinals for $2.9 million after having committed to play in college at Duke University... played third and pitched at Decatur, where his senior season was shortened by the Covid-19 pandemic after hitting .457 with four homers and 15 RBIs in 16 games... at the time of his selection at No. 21 overall, Walker was the youngest player ever selected in an MLB Draft by a Major League team until Nick Bitsko went No. 24 overall to the Tampa Bay Rays... Walker posted big numbers as a junior at Decatur, hitting .519 with 17 homers, 60 RBIs and 24 steals... was selected as Gatorade's Player of the Year in Georgia in 2020... was selected to the All-Star Futures Game in Los Angeles in 2022 while with Double-A Springfield... transitioned to the outfield in 2022... joined Salt River in the Arizona Fall League following the 2022 Texas League regular season... according to a profile by ksdk.com, Walker's pre-game routine includes a bowl of Coco Crisp cereal and video games with teammates in the clubhouse... son of Derek and Katrina Walker of Atlanta; he has a brother, Derek Jr... scouted by Charles Peterson, a Cardinals area scout who watched Walker from 2019-2020 -- Peterson, 46, died in September 2020 from complications from Covid-19 after telling Walker his dream of seeing him help the Cardinals to the World Series in 2025. “I would love nothing more than for that to happen,” Walker told ksdk.com... Walker was named a Rising Star in the AFL in 2022 and was a 2022 Texas League post-season All-Star... was named the Texas League's top MLB Prospect in 2022... was selected by MiLB.com as a Cardinals Organization All-Star in 2021 after spending time with Palm Beach and Peoria.