William Mays Eyre (born July 21, 1978 in Fountain Valley, California) is a relief pitcher for the Texas Rangers. He was All-State at Cyprus High School (UT) from which he graduated the same year. In and , he was an All-America selection playing outfield at the College of Eastern Utah.
He was drafted in the 23rd round of the 1999 Major League Baseball Draft by the Minnesota Twins. From 1999 to , Eyre made his way through the Twins' minor league system, playing for the Elizabethton Twins, Quad City River Bandits, Fort Myers Miracle, New Britain Rock Cats, Phoenix Desert Dogs (Arizona Fall League), and Rochester Red Wings. He made his major league debut for the Twins on April 6, , but was nontendered by the Twins on December 12, 2006, making him a free agent. The Texas Rangers signed Eyre to a minor league contract with an invitation to spring training. Eyre had Tommy John surgery in August , and is expected to miss most or all of .
Eyre is the brother of Scott Eyre, a major league relief pitcher for the Philadelphia Phillies. He also has a younger brother, Robert Grace who is playing in the minor leagues for the San Francisco Giants organization.