Exclusive rights contracts are one-year contracts worth the minimum salary based on the number of years a player has accrued.
Foster, 25, wound up signing on with the Bills as an undrafted free agent out of Alabama back in 2018. He agreed to a three-year, $1.51 million contract with the Bills, but was waived and later re-signed to their practice squad.
Buffalo promoted Foster to their active roster soon after and he managed to make the 53-man unit last year.
In 2019, Foster appeared in 13 games for the Bills and caught three passes for 64 yards receiving and no touchdowns. He also rushed for 29 yards on two carries.
Wallace, 24, wound up going undrafted out of Alabama back in 2018. He agreed to a three-year, $1.71 million contract with the Bills, but was waived coming out of the preseason.
Wallace had a brief stint on the Bills’ practice squad but was later promoted to the active roster during the 2018 season.
In 2019, Wallace appeared in all 16 games for the Bills and recorded 76 tackles, two interceptions and nine passes defended.