Though UFC 155 has not yet been confirmed by the UFC as far as an exact location or card number, the lineup is starting to fill up rather fast.

UFC officials announced on Monday that lightweights Joe Lauzon and Gray Maynard will square off at the year-end event.

UFC 155 is rumored for December 29 in Las Vegas. The card already features UFC heavyweight champion Junior dos Santos taking on former champion Cain Velasquez, and former middleweight contender Chael Sonnen entering the 205-pound division against ex-champion Forrest Griffin.

Lauzon (22-7) has become the “Bonus Man” in the UFC. Earlier this month, “J-Lau” scored both Fight of the Night and Submission of the Night honors for his victory over Jamie Varner. Lauzon, who wons 18 career submission wins, has picked up 11 UFC fight-night bonuses – a record for the promotion.

Maynard (11-1-1) jumped back into the title picture at 155 by earning a decision over Clay Guida earlier this year. “The Bully” was coming off a loss to Frankie Edgar in a bout for the UFC lightweight title.

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