If you knew in advance that a PWBA Tour event would be such a grind that only a small fraction of the players would average 200 or better, you’d better list Liz Johnson as one of the favorites. The USBC Hall of Famer is a supreme grinder who is one of the best — male or female — when the lanes are brutal. I believe she is the only woman ever to win the famed Petersen Classic. In this weekend’s PWBA Detroit Open,  just seven of the 120 players averaged...