The new deal on top of his initial two-year contract when drafted, will see him remain at the Dockers for at least the first four years of his career, until 2021.
“I heard that the club was interested in re-signing me and I’ve been treated really well here and everyone’s been really welcoming, so I just snatched it (the opportunity to re-sign) up as quickly as I could,” Brayshaw, the brother of Melbourne midfielder, Angus, said.
“I definitely feel there’s something special going on at the club and I’m really excited for the next few years and I definitely want to be a part of that.
“It’s really good to have a group of guys who are all going through the same sort of thing.
“At a lot of other clubs, there’s only two or three draftees but having us 10 who most have moved from interstate, it’s been really great to work off each together and sort things out together.
“It’s been a great experience so far.”
Fremantle list manager Brad Lloyd said the club is thrilled to secure the youngster who has already shown plenty of leadership qualities.
“Andrew’s has been outstanding since he arrived at the club,” Lloyd said.
“He’s been really upbeat and he’s attacked everything the club’s thrown at him. He’s spent some time living with Nat Fyfe. He’s been on a training camp already, where he displayed a lot of his qualities and he’s settling in really well.
“It’s really exciting for Andrew to commit to four years at the football club.
“He’s an exciting young player, we love his football and he’s also a quality person.
“We’re thrilled with the leadership he’s shown. We’ve had 22 young players enter the football club in the past two off-seasons, so to have a young player like Andrew show his commitment to the club with a two-year extension on top of an initial two-year term, it’s a really good sign and a show of faith by Andrew.”
Brayshaw’s other brother, Hamish, was drafted by West Coast with pick No.68 last month.