Darrelle Revis hasn’t even been traded yet, and the Jets defense has been decimated. DT Mike DeVito and NT Sione Po’uha are already out the door while safety LaRon Landry is expected to follow shortly. DeVito was the first Jet to find a new team, reaching an agreement with the Chiefs. Information about his impending trip to Kansas City came out shortly after the 4 p.m. opening to the league year. Several hours later, the defensive lineman had struck a deal, a source confirmed, prompting a reunion with former Jets LB coach Bob Sutton, now the defensive coordinator in K.C. DeVito is a six-year veteran out of Maine who had spent his entire career with the Jets after being signed as an undrafted free agent in 2007. Landry also looks like a goner as, according to a source, he heads to Indianapolis for a first visit in free agency. Landry had a strong season with the Jets, and his price tag is almost certain to be too high for Gang Green. Though Landry is a Pro Bowl defender, DeVito’s departure will also sting and be compounded by the fact that the Jets cut Po’uha just hours before the league year. Po’uha, 34, a seven-year veteran who also has exclusively played for the Jets, was hampered by a nagging back injury in 2012. While Po’uha was limited, DeVito often filled in; the departure of both means the Jets have a dearth of nose tackles with neither Kenrick Ellis nor Damon Harrison appearing ready.