Former St. Louis Rams center Jason Brown will visit the San Francisco 49ers this weekend, according to NFL reporter Adam Caplan. Brown entered free agency this offseason after three seasons in St. Louis. The Niners are in need of some interior help along the offensive line, which Brown could provide at center or right guard.

Former #Rams C Jason Brown is scheduled to visit the #49ers this weekend, source confirms.

— Adam Caplan (@caplannfl) April 3, 2012

The offensive line was one of San Francisco's biggest weak spots last year. During the regular season, the offense averaged just 4.1 yards per carry, finishing 20th in the league, and gave up the seventh-most sacks in the NFL. With Alex Smith locked into a three-year deal worth up to $33 million, head coach Jim Harbaugh and the 49ers front office no doubt would like to protect their investment as much as possible.

For more on Smith and the 49ers, be sure to check out Niners Nation and SB Nation Bay Area.