The other kickers on the roster include veteran Phil Dawson and undrafted free agent John Lunsford out of Liberty.
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Acosta, who is 24, was re-signed by the 49ers on January 5 after being waived prior to the start of the 2015 regular season. During preseason, Acosta went 4 of 4 on field goals, making kicks from 29, 38, 38 and 50 yards.
In March, Dawson signed a one-year deal to return to the 49ers, which will be his 18th season in the NFL. Dawson is 41 years old.
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