Despite a sterling record in the minor leagues, he never played well in the majors. Komminsk chalked it up to MLB coaches trying to change his mechanics so as "to be part of the Brad Komminsk project."[2] His Hall of Fame manager, Joe Torre, credited his failure to an asthma problem.[4] His Hall of Fame teammate and roommate Tom Glavine wrote that the pressure of high expectations may have hindered Komminsk to some extent.[5] In 2011, Baseball Prospectus included him in a list of the fifty most disappointing prospects of all time.[4] In 2015, Sporting News characterized Atlanta's selection of Komminsk over Andy Van Slyke as one of the five worst draft decisions in franchise history.[6]
Komminsk played parts of eight seasons in MLB. His best season came in 1989 with the Cleveland Indians. He only appeared in 100 or more games one time, a 106-game campaign with the Braves in 1985.[7] Komminsk spent a few seasons in the minors after his final MLB season in 1991, even playing professionally in Italy and for the independentWinnipeg Goldeyes of the Northern League.[2][8]
Since the end of his playing days, Komminsk has been a minor league coach and manager with several teams, including the Kinston Indians. He was also a hitting coach for the Norfolk Tides, the Class-AAA affiliate of the Baltimore Orioles.