SANTA CLARA, Calif. -- The San Francisco 49ers don't yet know how long kicker Eddy Piñeiro will be out with a right hamstring injury, but they have decided who his temporary replacement will be.

The Niners announced Wednesday afternoon that they signed kicker Matt Gay to their practice squad, a move that allows them to evaluate Piñeiro on a weekly basis without having to alter the 53-man roster.

Piñeiro suffered a grade 1 hamstring strain in his right (kicking) leg in Sunday's win against the Arizona Cardinals . Coach Kyle Shanahan said Monday that Piñeiro would be "week-to-week" and that the Niners would work out multiple kickers over the past 48 hours.

In addition to Gay, the 49ers had kickers Anders Carlson , John Parker Romo , Tanner Brown and Cade York in for tryou

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