- Mike Florio adds that the 49ers also worked out DT Stefan Charles, DB Devonte Johnson, and DB Josh Thornton.
Rubin, 31, is a former sixth-round pick of the Browns back in 2008. He spent seven years in Cleveland before signing a one-year deal with the Seahawks.
Rubin was entering the second year of a three-year, $12 million contract that contained $5.5 million guaranteed and set to earn a base salary of $1.7 million this year when the Seahawks cut him loose last weekend.
In 16 games for the Seahawks and recorded 38 tackles, one sack, two forced fumbles, and a pass defense. Pro Football Focus has him rated as the No. 90 interior defensive lineman out of 125 qualifying players.
Howard, 28, is a former fourth-round pick of the Seahawks back in 2012. He lasted just over a year in Seattle before he was waived and later claimed off of waivers by the Chiefs.
Howard re-signed with Kansas City last year and was in the final year of his two-year, $10 million contract and set to make a base salary of $3.7 million for the 2017 season when the Chiefs cut him loose.
The Bears signed Hoard to a contract a few days after this year’s draft only to cut him loose coming out of the preseason.
In 2016, Howard appeared in eight games for the Chiefs and recorded 24 tackles, one sack and a forced fumble. Pro Football Focus has him rated as the No. 55 interior defensive lineman out of 127 qualifying players.
Langford, 31, is a former third-round pick of the Dolphins back in 2008. He spent four years in Miami and played three seasons for the Rams before signing a four-year, $17.2 million contract with the Colts back in 2015.
Langford was set to make base salaries of $4 million (2017) and $4.2 million (2018) over the remainder of the contract when the Colts released him with a failed physical back in August.
In 2016, Langford appeared in eight games for the Colts and recorded 10 tackles, no sacks, a fumble recovery and two pass defenses.
We have most of these players featured in our Top 50 Available Free Agents list.