Clayton Blackburn (born January 6, 1993) is an American former professional baseball pitcher. His professional career spanned 2011–2017, most of which he spent in the farm system of the San Francisco Giants. Blackburn twice was added to a Major League Baseball (MLB) active roster, but never appeared in an MLB game. During his career he was listed at 6 feet 3 inches (1.91 m) and 230 pounds (100 kg) while throwing right-handed and batting left-handed.