NEW YORK — Brett Favre's agent said the New York Jets quarterback will retire.

The 39-year-old Favre instructed agent James "Bus" Cook to tell the team today that he won't return for a 19th NFL season — and second with the Jets.

In an e-mail to ESPN, Favre said he has no regrets about ending his career in New York and praises the team's owner, front office and fired coach Eric Mangini.

Favre wrote he enjoyed his time with the Jets, despite a late-season slump that saw New York go from 8-3 to missing the playoffs.

Favre threw nine interceptions as the Jets went 1-4 down the stretch, and a torn right biceps might have contributed.

He played the rest of his career with the Green Bay Packers.