If there was a theme to the Christmas Eve games, as NFL teams battled for playoff spots and some sort of momentum with the playoffs two weeks away, it was an awful one. Completing the terrible trifecta of “legs aren’t supposed to bend that way” injuries, Tyler Lockett of the Seattle Seahawks joined Marcus Mariota and Derek Carr.

Lockett was headed for surgery after his right leg became pinned beneath Brandon Williams of the Arizona Cardinals as the two fell to the turf on Lockett’s touchdown reception. As quarterback Russell Wilson celebrated the second-quarter score, he ran toward the end zone and quickly discovered that Lockett was hurt.

“ . . . I got close to him,” Wilson said, “and there was blood everywhere near his ankle. So that was an ugly situation. You just pray for him.”

Lockett, the team’s No. 2 wide receiver, is expected to have surgery and is out for the rest of the season, according to Coach Pete Carroll, declining to say exactly what the injury is.

“All of us were heartbroken for him over there, and he was consoling us,” said Doug Baldwin, one of the teammates who gathered around as Lockett’s leg was immobilized and he was carted off. “That speaks volumes about his faith and his resolve and the manner in which he goes about handling obstacles. This is just another obstacle for him, and I have no doubt that he’s going to come back from this stronger, both physically, mentally and spiritually.”

For the Seahawks, it was an especially sobering reminder of their mortality. Although they have won the NFC West at 9-5-1, they are hardly the menacing opponent that went to consecutive Super Bowls in 2014 and 2015. And, to boot, they’re likely to have to face the task of winning two games on the road.

Lockett was the third player to go down with a leg injury Saturday. Mariota, whose Tennessee Titans have been eliminated from the playoffs, and Carr, touted as an MVP candidate for the Oakland Raiders, both went down with broken fibulas. Mariota’s season already was over; Carr’s is now, but he tweeted Saturday evening that he is “not worried one bit.”

The same can’t be said for Raiders and Seahawks fans.