The team announced the deal tonight.
Decker, 26, had a career-high 87 receptions for 1,288 yards last season.
Now, he gets the opportunity to be a No. 1 wide receiver with the Jets' only other proven receiver on the roster being Jeremy Kerley.
Decker scored 11 touchdowns last season.
Decker averaged 86 receptions for 1,176 yards and a dozen touchdowns over the past two seasons.
The Jets ranked 29th in scoring and 31st in passing offense last season.
Decker has scored 32 touchdowns over the past three seasons.
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Aaron Wilson covers the Ravens for The Baltimore Sun