The San Francisco 49ers announced on Tuesday that they have placed center Daniel Kilgore on the Injured Reserve List and promoted offensive lineman Alex Balducci to the active roster from the team's practice squad. San Francisco has also signed offensive lineman Mitchell Van Dyk to the team's practice squad.

Balducci (6-4, 310) originally signed with San Francisco on May 6, 2016 as an undrafted free agent from the University of Oregon. After spending training camp with the team, he was waived on Sept. 3 and signed to the team's practice squad the following day.

Balducci will wear number 75.

Kilgore (6-3, 308) started in each of the team's 13 games this season.

Van Dyk (6-7, 299) was originally drafted by the St. Louis Rams in the 7th round (226th overall) of the 2014 NFL Draft. He was waived by the Rams on Aug. 30, 2014, signed with the Pittsburgh Steelers on Jan. 15, 2015, and spent the entire 2015 season on the Injured Reserve List. Following his release from Pittsburgh on Feb. 16, 2016, he signed with the Indianapolis Colts on April 21 and spent training camp with the team before his release on Sept. 3.

A 25-year-old native of Paso Robles, Cali., Van Dyk attended Portland State University where he appeared in 37 games (31 starts) from 2009-13. He earned All-Big Sky Conference honors as a senior (First-Team) and junior (Honorable Mention).