Jeffery Ray Cornell (born February 10, 1957) is a retired Major League Baseball pitcher. He played during the 1984 season at the major league level for the San Francisco Giants. He was drafted by the Kansas City Royals in the 8th round of the 1978 draft. Cornell played his first professional season with their Rookie League Gulf Coast League Royals in 1978. He was traded to the Giants in 1982. Cornell played his last season with the Chicago Cubs' Triple-A team, the Iowa Cubs, in 1986. After the end of his playing career, Cornell became a scout for the Toronto Blue Jays, Milwaukee Brewers, and in 2008 for the Tampa Bay Rays, his current position.