List of Famous people named Clay

Clay Jordan Collard is an American professional mixed martial artist and boxer. A professional since 2011, he formerly competed for the UFC. He currently competes in the lightweight division of the Professional Fighters League.

Ernest Clayton Walker Jr. is an American country music artist. He made his debut in 1993 with the single "What's It to You", which reached Number One on the Billboard Hot Country Singles & Tracks chart, as did its follow-up, 1994's "Live Until I Die". Both singles were included on his self-titled debut album, released in 1993 via Giant Records. He stayed with the label until its 2001 closure, later recording for Warner Bros. Records, RCA Records Nashville, and Curb Records.

Clay Daniel Buchholz is an American professional baseball pitcher who is a free agent. He has played in Major League Baseball (MLB) for the Boston Red Sox, Philadelphia Phillies, Arizona Diamondbacks, and Toronto Blue Jays. Buchholz made his MLB debut with the Red Sox in 2007. In his second major league start, he pitched a no-hitter, becoming the third MLB pitcher since 1900 to throw a no-hitter in his first or second start and the first Red Sox rookie to throw one. He is a two-time MLB All-Star.

Clay Margrave Armstrong is an American physiologist and a former student of Andrew Fielding Huxley. Armstrong received his MD from Washington University School of Medicine in 1960. He is currently emeritus professor of Physiology at the University of Pennsylvania. He has also held professorial appointments at Duke University and the University of Rochester.

Clayton Lee Mathile, born January 11, 1941) is an American billionaire businessman, best known for leading Iams to nearly $1 billion in sales before selling it to Procter & Gamble (P&G) for $2.3 billion in 1999 in what was, at the time, the largest cash-only deal in P&G's history.