McSorley and Twist fought 4x during exhibition play and McSorley won all 4 quite easily.
September 23, 1989 (St. Louis vs LA)
September 28, 1989 (St. Louis vs LA)
September 27, 1992 (Quebec vs LA)
October 1, 1993 (Quebec vs Pittsburgh)
During the 10 years that they were together in the NHL, their teams were scheduled to play against oine another 30 times, on only 5 occasions did both players participate in the same game (you can get this information from Hockey Reference).