Dunn was one of three offensive linemen the 49ers worked out on Tuesday. The 30-year-old has starting experience, adding depth to the offensive line.
Kiner sustained a high-ankle sprain in Saturday's preseason matchup against the Las Vegas Raiders. He was expected to miss at least a month.
The 49ers Communications staff provided the following rundown.
Dunn (6-5, 315) originally entered the NFL after signing with the Los Angeles Rams as an undrafted free agent on June 16, 2017. Throughout his eight-year NFL career with the Rams (2017-18), Jacksonville Jaguars (2018-19), Miami Dolphins (2019), and Cleveland Browns (2020-24), he has appeared in 53 regular-season games (nine starts) and two postseason contests (one start). In 2024, Dunn appeared in 13 games (three starts) with the Browns.
A 30-year-old native of Bethesda, MD, Dunn attended the University of Maryland for five seasons (2012-16), where he appeared in 46 games.
Knowles (6-2, 196) originally entered the NFL after signing with the Minnesota Vikings as an undrafted free agent on May 1, 2023. He has spent his two-year career with the Vikings (2023-24) and Green Bay Packers (2024). He signed with San Francisco on June 3, 2025, prior to being waived by the team on July 31.
A 25-year-old native of Mansfield, TX, Knowles attended Kansas State University (2018-22), where he appeared in 51 games (39 starts) and totaled 127 receptions for 1,867 yards and 14 touchdowns through the air to go along with 36 carries for 440 yards and four touchdowns on the ground. He earned Second-Team All-Big 12 in 2021.
Harris (6-4, 265) originally signed with the team on August 14, 2025. Kiner (5-9, 209) originally signed as an undrafted free agent with the team on April 28, 2025.
Related News
More San Francisco 49ers News
-
49ers roster moves: S Ashtyn Davis signed to one-year deal; RB waived
The San Francisco 49ers have signed safety Ashtyn Davis to a one-year deal. To make room on the roster, the team waived running back Jermar Jefferson. The 49ers Communications staff provided the following rundown. Davis (6-1, 205) was originally drafted by the New York Jets... -
49ers' roster overhaul reveals a fascinating trend under John Lynch
I have written in the past about what teams should consider when building a roster. Today, I will examine two trends that have emerged recently in 49erland. Trust the Conference In the past five seasons, the following receivers have been All-Pro selections. Ja'Marr... -
NFL execs: 49ers could use in-season Mac Jones trade to bolster roster
The San Francisco 49ers never seriously entertained the idea of trading quarterback Mac Jones, especially after he stepped in for an injured Brock Purdy last season and helped keep the offense on track. However, with Jones entering the final year of his contract, 2026 could... -
49ers facing harsh reality as NFL execs label Brandon Aiyuk 'untradeable'
There appears to be no trade market for San Francisco 49ers wide receiver Brandon Aiyuk, despite the team's hope that interest could eventually develop. With rival teams believing the 49ers will ultimately release the disgruntled receiver, there is little incentive to surrender...