The Jets haven't given up on upgrading their roster yet:
Jets worked out former Bills’ DL Adolphus Washington, per source.— Adam Schefter (@AdamSchefter) September 14, 2018
Washington is a former third-round pick, who is still only 23. He's a 295-pound interior lineman who started 21 games over his first two seasons, recording 56 tackles and 3.5 sacks. He was a teammate of Darron Lee in college.
While he was a disappointment with the Bills, SB Nation's Stephen White predicted he'd have a breakout year in 2018. The Bills apparently tried and failed to trade him last week and also at last year's trading deadline.