Kilgore, 27, is a former fifth-round pick of the 49ers back in 2011. He signed a four-year, $6.045 million contract that included a $1.35 million signing bonus with the 49ers last year.
He stands to make base salaries of $800,000 (2015), $900,000 (2016), and $1 million (2017) over the remainder of the agreement.
San Francisco placed himon the reserve/PUP list at the start of the season.
Last year, Kilgore appeared in seven games for the 49ers.