James Edward Key (born April 22, 1961) is a former left-handed starting pitcher in Major League Baseball who played for the Toronto Blue Jays (1984–1992), New York Yankees (1993–1996), and Baltimore Orioles (1997–1998).
His best personal years were in 1987, when he posted a 17–8 record with a league-leading 2.76 ERA, and in 1993, when he went 18–6 with a 3.00 ERA and 173 strikeouts.
With the Blue Jays, he won the 1992 World Series and with the Yankees, he won the 1996 World Series, both over the Atlanta Braves.