William Kempner Stats & Bio | Marlins

About William Kempner

William Kempner is a pitcher for the Miami Marlins, bringing a determined and competitive presence to the mound. Having forged his path to professional baseball without the traditional college route, Kempner's journey to the majors speaks to his raw talent and relentless work ethic. He has demonstrated the kind of resilience that scouts and coaches admire in players who earn their opportunity through sheer dedication rather than a well-traveled road. In his recent outing, Kempner delivered a strong performance, posting a 0.0 ERA while recording a strikeout across 1.1 innings of work, showcasing his ability to keep hitters off balance and protect the plate. As he continues to develop within the Marlins organization, Kempner represents the next generation of pitching talent ready to make his mark in Major League Baseball.

Updated: Jun 6, 2026