Lane Johnson was out for the Philadelphia Eagles in the second half of Sunday's win over the Arizona Cardinals with a head injury.

Turns out, he may miss Thursday's game against the Carolina Panthers as well.

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Via Paul Domowitch of the Philadelphia Daily News, Johnson won't be able to go through the NFL's concussion protocol in time for Thursday Night Football. Because of this development and the short week, Johnson would be out Thursday against the Panthers.

According to Jeff McLane of the Philadelphia Inquirer, Johnson said he'll be good to go against the Panthers.

Lane Johnson, who left with a head injury: "I'll be alright." Asked about playing the Panthers on Thursday, he said, "Yeah." #Eagles — Jeff McLane (@Jeff_McLane) October 8, 2017

Halapoulivaati Vaitai would start in place of Johnson if he misses.

Johnson will have to go through concussion protocol this week.

To follow Eagles reporter Jeff Kerr on Twitter: @JeffKerr247