Niemi made 22 saves in what was the 21st blanking of his five-year career, the last three having been spent with the Sharks.
San Jose's only other goal came shorthanded from Tommy Wingels 6:44 into the third.
The Sharks have won two straight and moved into a tie with St. Louis for the seventh and eighth post-season spots in the Western Conference. With 36 points, the Blues and Sharks have a two-point lead over Nashville and a three-point advantage over Dallas and Columbus.
All four goals were given up by Jonas Hiller on 29 shots.
Members of Congress to keep receiving porn magazine
Putin thinks Obama would save him if he were drowning