Luke Weaver is an American professional baseball pitcher whose career began after being selected by the St. Louis Cardinals with the 27th overall pick in the 2014 Major League Baseball draft. He advanced through the Cardinals system and made his major league debut in 2017. Over the course of his career, Weaver has also spent time with the Arizona Diamondbacks and the Washington Nationals, reflecting his movement across multiple MLB organizations since reaching the top level.
Before turning professional, Weaver attended Florida State University, where he developed as a pitcher and positioned himself for the MLB draft selection. Being taken 27th overall in 2014 by the Cardinals highlighted his standing among collegiate prospects entering professional baseball. His progression from college to the majors in 2017 reflects a standard development path through minor league systems, followed by stints with multiple major league clubs, including the Diamondbacks and Nationals, as teams evaluated his pitching depth and role at the top level.