The Manchester United man's one-year contract extension will take him past his 40th birthday, which will enable him to join Gordon Strachan and former Red Devils team-mate Teddy Sheringham in a very exclusive veteran's club for outfield players.
Yet Ferguson does not believe that will be the end of Giggs' assault on the personal record books.
For such is his present fitness and form, the United boss expects him to carry on and on.
"Ryan is an exceptional human being," Ferguson told Sirius XM. "He has never carried any weight, has never suffered a serious injury and never misses a training session. He is still at the head of the pack during pre-season.
"He just has this insatiable appetite to continue playing.
"He will play next year and who knows he could possibly play for another year after that.
"I am sure he will get to 41 and still be playing because he is such a fit lad."