Klis adds that he expects the Broncos to make more transactions in the next 24 hours now that they have a few roster spots available.
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 coming out of the preseason.
The Broncos signed him to a contract a week later.
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.
In 2017, Rubin has been active for two games for the Broncos but has yet to record a statistic.