The 49ers will work out center Tim Barnes on Tuesday, according to Jim Thomas of the St. Louis Post-Dispatch (on Twitter). This marks Barnes’ first known audition since being let go by the Rams earlier this offseason. 
Barnes’ release came as a mild surprise in Los Angeles since he had adequately served as the team’s starting center for two seasons. After 32 consecutive starts for St. Louis/Los Angeles, he’s now seeking his next home. In 2015, he ranked as Pro Football Focus’ 29th-best center out of 39 qualifiers. This past season, PFF ranked him 31st out of 38 qualifiers.
The Niners acquired Jeremy Zuttah earlier this offseason and he currently projects to start at center. If they sign Barnes, it’s possible that the Niners could have an open competition to determine the No. 1 role.