Garrett Boulware scored on the play after he led off the inning with a double and advanced to third on a single by Blake Trahan.
The double by Williams scored Boulware to give the Bats a 2-1 lead.
In the top of the first, Toledo took the lead on a solo home run by Ronny Rodriguez. Louisville answered in the bottom of the inning when Brandon Dixon hit a solo home run.
Dixon homered and singled, also stealing a base in the win.
Louisville right-hander Robert Stephenson (2-4) picked up a quality start and the win after allowing one run on just two hits over six innings. Opposing starter Artie Lewicki (3-3) took the tough loss in the International League game after giving up two runs and seven hits over 6 1/3 innings. Kevin Quackenbush retired the side in order for his third save of the season.
For the Mud Hens, Rodriguez homered and singled.
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