Ringo, 26, is a former sixth-round pick of the Packers back in 2015. He was unable to make the 53-man roster during his rookie season but was later signed to their practice squad and eventually brought back on a future/reserve contract.
The Packers re-signed Ringo to a one-year, exclusive rights contract last year before cutting him loose coming out of the preseason. He had brief stints with the Bengals and Lions before signing on to the Cowboys’ practice squad a few months ago.
Dallas elected to promote Ringo to their active roster for Week 11 but waived him earlier this week.
In 2017, Ringo appeared in six games for the Lions and recorded three tackles and no sacks.
Washington, 25, is a former third-round pick of the Bills back in 2016. He was in the third year of his four-year, $3.189 million contract and set to make a base salary of $630,000 for the 2018 season when the Bills recently waived him.
Buffalo had been trying to trade Washington for a few years before they officially cut him loose. The Cowboys signed him to their practice squad before the Bengals added him to their active roster in late September.
In 2018, Washington has appeared in five games and recorded eight tackles and a sack.