The Jets added Eric Decker to their current wide receiver group, but still need to add difference makers at the position. Josh Huff out of Oregon is a very good athlete, a 4.4 at the combine, and is great after the catch. Huff doesn't have great size at 5'11 and did drop a fair amount of passes at Oregon, but if developed could turn into a very nice receiver.
Exum may play cornerback, but he looks the part of a safety. Exum is 6'0 and is very big. Exum has good athletic ability and can contribute on special teams at the next level. Exum tore his ACL during his career at Virginia Tech, but seems to have fully recovered.
Reynolds, like Exum, had ACL during his college career at Stanford. Reynolds has good size at 6'1, 207, and is a very physical safety. The Jets have are fine at the safety position as of now, but could use an upgrade. Reynolds has potential, and I think Rex is the right man to tap into it.