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    vs.      
David Humpherys is tied in the series against Joseph Hartline, 1-1.

event round table player one result player two
Grand Prix Columbus 2004429Humpherys, David (1971)Lost 0-2Hartline, Joseph (1553)
Grand Prix Columbus 20041056Humpherys, David (1958)Won 2-1Hartline, Joseph (1582)