Richard (ankle) signed a two-year contract extension with the Raiders on Wednesday, Scott Bair of NBC Sports Bay Area reports.
Abram is at 90 percent after tearing his rotator cuff in Oakland's 2019 season opener, Vic Tafur of The Athletic reports.
Leavitt had 10 tackles (six solo) in 15 games this season.
Mauro had 19 tackles (11 solo) and one pass break up in 13 games this season.
Hall had 26 tackles (18 solo) and 1.5 sacks in 16 games (12 starts) this season.
Riley had 34 tackles (27 solo), one pass defensed and one forced fumble in 16 games this season.
Tomlinson caught his only target for one yard in eight games between the Giants, Patriots and Raiders this season.
Glennon completed six of 10 passes for 56 yards and one touchdown and fumbled three times -- losing one -- in two games this season.
Kizer was active for four games but didn't play a snap during the 2019 season.
Mayowa recorded 15 tackles, seven sacks and three forced fumbles over 15 games in 2019.
Hurst posted 18 tackles, 3.5 sacks and three pass breakups over 16 games in 2019.
Ferrell posted 38 tackles, 4.5 sacks and five pass breakups over 15 games in 2019.
Compton recorded 41 tackles over nine games in 2019.
Crosby posted 47 tackles, 10 sacks, four pass breakups and four forced fumbles over 16 games in 2019.
Joyner posted 49 tackles and three pass breakups over 14 games in 2019.
Hankins posted 50 tackles, 1.5 sacks and a pass breakup over 16 games in 2019.
Mullen posted 50 tackles, 10 pass breakups and an interception over 16 games in 2019.
Worley posted 58 tackles, eight pass breakups and an interception over 15 games in 2019.
Morrow posted 73 tackles, four pass breakups and an interception over 16 games in 2019.
Harris posted 74 tackles, eight pass breakups and three interceptions over 16 games in 2019.
Crawley (shoulder) signed with the Raiders on Thursday, Howard Balzer of 590 The Fan St. Louis reports.
Lawson (suspension) signed a one-year contract extension with the Raiders on Thursday.
Good signed a one-year extension worth $2.3 million with $1.4 million guaranteed, Tom Pelissero of NFL Network reports.
Johnson underwent minor back surgery Tuesday according to his personal Twitter account.
Thompson signed a reserve/future contract with the Raiders on Tuesday.