Justin Jefferson has already accomplished a ton in his four short years in the NFL ... and Randy Moss tells TMZ Sports he believes the 26-year-old is "on pace" to go down as the greatest Vikings receiver ever!!
We asked Moss for his thoughts on the man who could one day take up Randy's mantle as the best wideout to wear the Purple and Gold ... and it's clear the immortal NFL player is really high on Justin.
"I think Justin Jefferson is on pace to be arguably the greatest ever and definitely the greatest Viking to ever do it!