Not nearly good enough. The Jets ranked 28th in the NFL in sack percentage, and Muhammad Wilkerson was terrible, which led the Jets to cut him. The Jets can't afford to have such an ineffective pass rusher in 2018. Wilkerson last season had 3.5 sacks, compared to two for Williams, and 1.5 for Steve McLendon. Yikes. The Jets also ranked 24th in the league last year in rushing defense. Rough year for their defensive line.
Deon Simon faces an uphill battle to make the roster, since the Jets brought back Mike Pennel as McLendon's understudy.