Finch, who finished up 3-for-3 on the evening, came out blasting in the top of the first with a two-out grand slam to score Leneah Manuma, Toni Mascarenas and Nicole Giordano. She would add two more runs to the Arizona tally in the third with a double to right and finished out her historic night with the three run homer in the seventh.
Senior Becky Lemke earned her 13th win of the season with a complete game, three hit performance. She struck out nine and walked only one.
Other Wildcats with impressive outings were Giordano and Mascarenas who each finished 3-for-4 with three runs scored.
The Wildcats will continue their Pac-10 road trip in Corvallis, Ore., where they will face Oregon State for two games on Saturday and Sunday.