Michael John Kinnunen (born April 1, 1958) is a former professional baseball pitcher.

He holds the major league record for most pitching appearances without a decision of any kind (win, loss or save) with 48.

Kinnunen attended Washington State University, where he played college baseball for the Cougars from 1977 to 1979.

He finally made it back to the majors in 1986 after bouncing around the minors for several years.

As of 2008, Kinnunen was living in Carolina, Puerto Rico, where he worked at Roberto Clemente Stadium.