Irvin has appeared in 121 NFL games with 92 starts in nine seasons with the Seahawks (2012-15, 2020), Raiders (2016-18), Falcons (2018) and Panthers (2019). He has recorded 308 tackles, 52.0 sacks, 64 tackles-for-loss, three interceptions, 16 forced fumbles and three fumble recoveries.
Irvin was selected by the Seahawks with the 15th pick in the first round of the 2012 draft out of West Virginia. After registering a career-high 8.5 sacks with the Panthers in 2019, he returned for a second stint with Seattle in 2020 but tore his ACL in the second game of the season.
Trevathan missed the first four games this season with a knee injury. The 10-year NFL veteran appeared in the last five contests, registering 19 tackles.
The Bears signed Marsh to their practice squad Nov. 3 and flexed him to their active roster Nov. 8 against the Steelers. He registered five tackles and a key sack but drew a controversial taunting penalty on the play.
Marsh joined the Bears having played in 92 NFL games with nine starts over seven seasons with the Seahawks (2014-16), Patriots (2017), 49ers (2017-18), Cardinals (2019), Jaguars (2020), Colts (2020) and Steelers (2020). Marsh has recorded 175 tackles, 14.0 sacks, 25 tackles-for-loss, five forced fumbles and two fumble recoveries. He was selected by the Seahawks in the fourth round of the 2014 draft out of UCLA.
Irvin was teammates with Marsh with the Seahawks in 2015-16 and with Bears outside linebacker Khalil Mack with the Raiders in 2017.
The Bears practiced inside the Walter Payton Center on a rainy Wednesday afternoon as the team continues preparations for Sunday's matchup with the Baltimore Ravens at Soldier Field.