Luke Weaver (born August 21, 1993) is a professional baseball pitcher currently playing for the Pittsburgh Pirates in Major League Baseball. A standout at Florida State University, he was drafted in the first round by the St. Louis Cardinals in 2014 and made his MLB debut in 2016, later earning the organization's Minor League Pitcher of the Year award. After being traded to the Arizona Diamondbacks following the 2018 season, he struggled as a starter, ultimately facing midseason releases from the Kansas City Royals, Cincinnati Reds, and Seattle Mariners. His career took a dramatic turn with the New York Yankees, where he excelled as the team's closer in 2024, pitching in that year's World Series. He then signed with the New York Mets ahead of the 2026 season, but was traded to the Pirates at the 2026 trade deadline. This winding journey highlights a resilient pitcher who has successfully reinvented himself across multiple major league franchises.