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Robert Wallerstein is tied in the series against Matthew Mccullough, 1-1.

event	round	table	player one	result	player two
Grand Prix Kansas City 2011	4	148	Wallerstein, Robert (1539)	Won 2-1	Mccullough, Matthew (1467)
Grand Prix Seattle 2019	13	52	Wallerstein, Robert (1881)	Lost 0-2	Mccullough, Matthew (1826)