Aaron Rodgers is breaking his silence on his Achilles tear ... saying he's "completely heartbroken" over the injury -- though he added he ain't ready to retire over it all ... at least, not yet.
The quarterback took to his Instagram page Wednesday to reflect on the ailment he suffered in the Jets' win over the Bills on Monday night ... and he got emotional.
He thanked everyone who reached out with well wishes ... while saying he fully intends to get back to everyone soon.