A Carolina Panthers fan looks on during the second quarter against the Tampa Bay Buccaneers at Bank of America Stadium.

A San Francisco 49ers dressed as Santa during the first quarter against the Jacksonville Jaguars at Levi's Stadium.

A Tennessee Titans cheer leader looks on dressed as a Christmas tree during the second half against the Los Angeles Rams at Nissan Stadium.

Kansas City Chiefs head coach Andy Reid, dressed as Santa Claus, speaks in the locker room following a game against the Miami Dolphins on Sunday, December 24, 2017.

Wearing a holiday suit Washington Redskins quarterback Kirk Cousins signs autographs after an NFL football game against the Denver Broncos in Landover, Md., Sunday, Dec 24, 2017. The Redskins defeated the Broncos 27-11.

A fan shown dressed up as the Grinch for Christmas watches during the first half of an NFL football game between the San Francisco 49ers and the Jacksonville Jaguars in Santa Clara, Calif., Sunday, Dec. 24, 2017.

Fans watch during the second half of an NFL football game between the New York Jets and the Los Angeles Chargers Sunday, Dec. 24, 2017, in East Rutherford, N.J.

New Orleans Saints fans sport Christmas costumes in the second half of an NFL football game against the Atlanta Falcons in New Orleans, Sunday, Dec. 24, 2017.

A fan dressed as Santa Claus watches players warm up before an NFL football game between the San Francisco 49ers and the Jacksonville Jaguars in Santa Clara, Calif., Sunday, Dec. 24, 2017.

Fans dressed in Christmas outfits watch the second half of an NFL football game between the New England Patriots and the Buffalo Bills, Sunday, Dec. 24, 2017, in Foxborough, Mass.

Fans wearing Christmas outfits cheer during the first half of an NFL football game between the New England Patriots and the Buffalo Bills, Sunday, Dec. 24, 2017, in Foxborough, Mass.

A Kansas City Chiefs fan follows the first half of an NFL football game against the Miami Dolphins in Kansas City, Mo., Sunday, Dec. 24, 2017.

Tennessee Titans cheerleaders perform during an NFL football game between the Titans and the Los Angeles Rams Sunday, Dec. 24, 2017, in Nashville, Tenn.

Santa Claus leads the New England Patriots onto the field for an NFL football game against the Buffalo Bills, Sunday, Dec. 24, 2017, in Foxborough, Mass.

A fan wears a grinch Christmas outfit before an NFL football game between the New England Patriots and the Buffalo Bills, Sunday, Dec. 24, 2017, in Foxborough, Mass.

New York Jets cheerleaders perform during the first half of an NFL football game against the Los Angeles Chargers Sunday, Dec. 24, 2017, in East Rutherford, N.J.

A fan wearing a Santa Claus suit watches in the first half of an NFL football game between the Tennessee Titans and the Los Angeles Rams Sunday, Dec. 24, 2017, in Nashville, Tenn.

A Carolina Panthers cheerleader performs during the first half of an NFL football game against the Tampa Bay Buccaneers in Charlotte, N.C., Sunday, Dec. 24, 2017.

New Orleans Saints quarterback Drew Brees (9) leads the who dat chant with former player Steve Gleason who suffers from ALS prior to kickoff of a game against the Atlanta Falcons at the Mercedes-Benz Superdome.

Football fans dressed as Santas cheer during the first half of an NFL football game between the Detroit Lions and the Cincinnati Bengals, Sunday, Dec. 24, 2017, in Cincinnati.

Denver Broncos outside linebacker Von Miller (58) walks across the field wearing Christmas themed cleats before an NFL football game against Washington Redskins in Landover, Md., Sunday, Dec 24, 2017.

Fans tailgate at Levi's Stadium before an NFL football game between the San Francisco 49ers and the Jacksonville Jaguars in Santa Clara, Calif., Sunday, Dec. 24, 2017.

Fans tailgate at Levi's Stadium before an NFL football game between the San Francisco 49ers and the Jacksonville Jaguars in Santa Clara, Calif., Sunday, Dec. 24, 2017.

A Green Bay Packers fan watches during the first half of an NFL football game against the Minnesota Vikings Saturday, Dec. 23, 2017, in Green Bay, Wis.

Fans sing the national anthem before an NFL football game between the Green Bay Packers and the Minnesota Vikings Saturday, Dec. 23, 2017, in Green Bay, Wis.

A fan wears a frozen tundra costume before an NFL football game between the Green Bay Packers and the Minnesota Vikings Saturday, Dec. 23, 2017, in Green Bay, Wis.

Fans tailgate before an NFL football game between the Green Bay Packers and the Minnesota Vikings Saturday, Dec. 23, 2017, in Green Bay, Wis.

Baltimore Ravens cheerleaders preform during the second half of an NFL football game against Indianapolis Colts in Baltimore, Saturday, Dec 23, 2017.

Baltimore Ravens linebacker Steven Johnson walks across the field before an NFL football game against Indianapolis Colts in Baltimore, Saturday, Dec 23, 2017.

Baltimore Ravens free safety Eric Weddle (32) warms up before an NFL football game against the Indianapolis Colts in Baltimore on Saturday, Dec. 23, 2017.

Houston Texans cheerleaders perform before an NFL football game against the Pittsburgh Steelers Monday, Dec. 25, 2017, in Houston.

Houston Texans cheerleaders perform before an NFL football game against the Pittsburgh Steelers Monday, Dec. 25, 2017, in Houston.

Houston Texans fans cheer before an NFL football game against the Pittsburgh Steelers Monday, Dec. 25, 2017, in Houston.

A Pittsburgh Steelers fan cheers before an NFL football game against the Houston Texans Monday, Dec. 25, 2017, in Houston.

Pittsburgh Steelers fans before an NFL football game against the Houston Texans Monday, Dec. 25, 2017, in Houston.

Pittsburgh Steelers fans hold a sign up before an NFL football game against the Houston Texans Monday, Dec. 25, 2017, in Houston.