Amendola, who began his career with the St. Louis Rams, has started 29 of 80 possible games for the Patriots, contributing 2,383 yards and 12 touchdowns on his 230 receptions from Tom Brady and New England's other quarterbacks.
The Dolphins traded slot receiver Jarvis Landry to the Browns this past week. Amendola finished with 61 catches for 659 yards and two touchdowns. However, he must have liked Miami's offer enough to decide to leave the perennial Super Bowl contenders.
Plus, Amendola saves his best football for January, when the Dolphins have seldom played in meaningful games and seem highly unlikely to do so again this season.
Marcus Smart tears tendon in thumb, out indefinitely for Celtics
The Celtics also lost backup center Daniel Theis to season-ending surgery to fix a torn meniscus. Yahoo Sports' Shams Charania was the first to report the potential tear.
As for the Patriots, they should still be fine at wide receiver for next season even with Amendola's absence.
For the Patriots' part, they had to manage Amendola's snaps in the regular season to preserve the knee.
The Patriots still have receivers Julian Edelman, Brandin Cooks, Chris Hogan, Malcolm Mitchell, Phillip Dorsett, Kenny Britt, Cody Hollister, and Riley McCarron under contract for 2018.