PHILADELPHIA — Federal prosecutors in Philadelphia say a man has pleaded guilty to sending letters to Giants coach Tom Coughlin in which he threatened to expose a fictitious sexual tryst among the coach and two women.

Prosecutors say 30-year-old Herbert Alex Simpson of Philadelphia pleaded guilty to two counts of mailing threatening communications.

Defense lawyer Nialena Caravasos says her client has disabilities that require a mental health exam and that will be taken into account at his sentencing, which is scheduled for Feb. 26.