Well, fight fans: Be sure to circle Dec. 12 on your calendars – because UFC 194 is shaping up to be one hell of a card.

UFC officials today announced welterweight contenders Demian Maia (21-6 MMA, 15-6 UFC) and Gunnar Nelson (14-1-1 MMA, 5-1 UFC) have joined the already-loaded lineup.

UFC 194 takes place at Las Vegas’ MGM Grand Garden Arena. The main card airs on pay-per-view following prelims on FOX Sports 1 and UFC Fight Pass.

Maia is ranked No. 10 and Nelson is No. 15 in the NOS Energy Drink MMA welterweight rankings.

Maia, who had an initial run of success of welterweight before a pair of back-to-back losses, looks to continue his resurgence. The 37-year-old Brazilian and former middleweight title challenger recently picked up a submission victory over surging Neil Magny (and earned a “Performance of the Night” bonus) and now owns a three-fight winning streak.

He meets another grappling specialist in Nelson, a 27-year-old Icelandic fighter who opened his pro career with a 13-0-1 mark before a split-decision loss to Rick Story in 2014. He recently returned to the win column with a submission victory over Brandon Thatch. Nelson now has 10 submissions in 14 career victories.

With the addition, the latest UFC 194 lineup now includes:

Champ Jose Aldo vs. interim champ Conor McGregor – for featherweight title Champ Chris Weidman vs. Luke Rockhold – for middleweight title Yoel Romero vs. Ronaldo Souza Max Holloway vs. Jeremy Stephens Urijah Faber vs. Frankie Saenz Demian Maia vs. Gunnar Nelson Tecia Torres vs. Michelle Waterson Warlley Alves vs. Colby Covington Marcio Alexandre Jr. vs. Court McGee John Makdessi vs. Yancy Medeiros Kevin Lee vs. Leonardo Santos Magomed Mustafaev vs. Joe Proctor

For more on UFC 194, check out the UFC Rumors section of the site.