10th October 2018, 20:23 | catalans
The 29-year-old France international has made 188 Betfred Super League appearances since joining the Dragons from Sydney Roosters in 2011 and was a member of the Ladbrokes Challenge Cup-winning team in August.
Catalans coach Steve McNamara said: “Jason is a hugely important member of our club.
“His performances and impact on the field and his ability to help connect the group off the field played a big part in our progression as a team in 2018.”
Paris-born Baitieri said: “I’m very happy to be staying for a further two seasons which will mean that I will have been a Dragon for a decade.
“Never did I ever imagine my life turning out like this and it’s humbling to be a part of what is such a unique club in the rugby league community.
“This year has been a turning point of the club’s history and we have a special group of players that can achieve more, I’m sure of it.”