SANTA CLARA, Calif. -- After finally finding some much-needed consistency, the San Francisco 49ers ' kicking situation is back in flux.

Niners coach Kyle Shanahan announced Monday that veteran kicker Eddy Piñeiro suffered a Grade 1 strain in his right (kicking) hamstring in Sunday's win against the Arizona Cardinals . Piñeiro, according to Shanahan, will be week-to-week and is likely to miss some time.

That means the 49ers will once again have to go to the free-agent market this week in search of help at a position that Piñeiro had finally stabilized after signing in Week 2.

"We're going to bring in some guys for a workout," Shanahan said. "They're working on that now. They're going to do it either tomorrow or Wednesday."

Shanahan said he and the organization have not discussed b

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