NEW YORK (AP) -- New York Jets wide receiver-punt returner Jeremy Kerley has been suspended four games without pay by the NFL for violating the league's policy on performance enhancing substances.

The NFL says in a statement Monday that Kerley's suspension begins immediately. He will be eligible to return to the Jets' active roster on Dec. 11, the day after New York plays at Denver. The next game in which Kerley will be able to play will be at New Orleans on Dec. 17.

In a statement released by his representatives, Kerley says he was "shocked" to test positive for Turinabol. He adds that he has never used steroids and fully intends to investigate what caused the positive test.

Kerley, who has 22 catches for 217 yards and a touchdown, says he has always been and will continue to be "a clean player."