When the Jets made their final three roster moves yesterday they waived Jace Amaro, who has been claimed by the Titans. They also waived Dee Milliner and Trevor Reilly with an injury designation. Since neither player was claimed, they are now on the Jets injured reserve list.
Connor Hughes does an excellent job of explaining this on NJ.com today.
Because the Jets waived/injured Milliner and Reilly during the 53-man cut on Saturday, they are not eligible to return to the field.
They will remain on the IR throughout the 2016 season unless they reach an injury settlement with the Jets.