The initial announcement was made via the UFC Canada Twitter account:
Light Heavyweight's Chad Griggs and Cyrille Diabate added to #UFC154 card for Nov 17.— UFC Canada (@UFC_CA) September 19, 2012
Griggs was a reserve member of the Strikeforce Heavyweight Grand Prix and won both of his reserve bouts. He made his UFC debut at UFC 145 and suffered a first-round submission loss to Travis Browne. This bout will mark Griggs' light-heavyweight debut.
He was first set to make his 205-pound debut at UFC on FOX 4 against Phil Davis, but an injury sidelined the 11-2 fighter.
Cyrille Diabaté returns to the Octagon for the first time since picking up a majority decision victory over Tom DeBlass at UFC on Fuel TV: Gustafsson vs. Silva.
Diabaté was originally slated to face off against Fabio Maldonado, but Maldonado replaced Quinton Jackson on the UFC 153 card against Glover Teixeira.
The light-heavyweight scrap will likely be featured on the preliminary card.
UFC 154 will take place on November 17th from the Bell Centre in Montreal, Quebec. While not officially announced, the event is to be headlined by UFC Welterweight Champion Georges St. Pierre fighting Interim Champion Carlos Condit. It will air live on pay-per-view.