Giants DT Jimmy Kennedy had been suspended by the NFL today
Via the Star-Ledger
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"Yup, confirming @HBalzer721’s report: Giants DT Jimmy Kennedy has been suspended by the NFL. Reason not yet known. …The Giants have a DT on the practice squad: Dwayne Hendricks. No word yet if he has, or will be, promoted. #nygweb • 10/11/11 5:33 PM"
The suspension is for less than a year. Little details other than that are known right now. You would have to suspect performance enhancing drugs are at work here, but that is total speculation.