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 the Niners would work out multiple kickers over the past 48 hours.

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

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