AFC

Tennessee Titans running back Derrick Henry earned the AFC Offensive Player of the Month honor for December. Henry put on a historic 238-yard, four-touchdown performance in Week 13 and ended the month with 625 yards and eight touchdowns, which eclipsed his entire production from the first 12 weeks of the campaign.

Indianapolis Colts linebacker Darius Leonard was named the AFC Defensive Player of the Month. The rookie racked up nearly 10 tackles per game to cement his status as 2018's top tackler. He also threw in a sack and four tackles for loss, and had a game-icing interception in the regular-season finale to seal Indy's place in the playoffs.

Completing a sweep for the South, Houston Texans kicker Ka'imi Fairbairn was named the AFC Special Teams Player of the Month. Fairbairn was perfect in December, hitting on all 13 of his field-goal attempts to break the Texans' regular-season record of 35 total successful kicks.

NFC

Seattle Seahawks running back Chris Carson earned the NFC Offensive Player of the Month award. The second-year back finally gave Seattle the kind of ground game it's been missing since Marshawn Lynch retired, as Carson averaged over 100 yards and one touchdown per contest to push Pete Carroll's team into a wild-card spot.

Los Angeles Rams star defensive tackle Aaron Donald added another piece of hardware to his ever-expanding collection by taking home the NFC Defensive Player of the Month honor. Donald produced six sacks to come just two shy of breaking the all-time single-season record of 22.5, but his league-leading mark was still the most ever by a defensive tackle.

San Francisco 49ers kicker Robbie Gould earned NFC Special Teams Player of the Month honors after a flawless final month. The veteran went 10-for-10 on field-goal attempts to finish as the league's most accurate kicker.

Rookies

Baltimore Ravens quarterback Lamar Jackson was named the Offensive Rookie of the Month after leading his team to its first AFC North title since 2012. The rookie scored seven total touchdowns and averaged 73.2 rushing yards per game down the stretch, silencing any remaining doubters who called for him to move to wide receiver.

Buffalo Bills linebacker Tremaine Edmunds earned the Defensive Rookie of the Month honor after putting up an eye-popping 43 tackles, two interceptions, and a sack in the final five games of the campaign. Edmunds' top performance was a dominant display against the Miami Dolphins in Week 17 when he racked up a career-high 12 tackles and an interception.