 Complete the following phrase:  The theory became more prominent in 1990 when it was popularized by syndicated Chicago Tribune columnist Mike Royko and continued predictions by Ron Berler. On October 16, 1990, Berler again asserted the ex-Cubs factor as the reason that the favored Oakland Athletics with ex-Cubs Scott Sanderson, Dennis Eckersley, and Ron Hassey would lose in the 1990 World Series which they did by getting swept by the Cincinnati Reds. It was again cited by Berler as a reason for the defeat of the league-leading 1991 Pittsburgh Pirates in the 1991 National League Championship Series to the Atlanta Braves. Mike Royko used the ex-Cubs factor to predict the playoff collapse of the 104-win 1993 Atlanta Braves which did occur in the 