It was the third shutout of the season for Miller and the 20th of his eight-year career, all of it spent with the Sabres. His career-best, single-season shutout total is five.
The Sharks were held without a goal for the sixth time this year and for the second time in six games. San Jose has dropped two straight.
Antero Niittymaki allowed all three goals on 22 shots.
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