Denver Broncos receiver Wes Welker initially was evaluated on the field for a neck injury during the Broncos' game Sunday night, and no concussion symptoms were apparent at that time, the team said Tuesday.

It wasn't until Welker was on the sideline several minutes later that he began experiencing symptoms consistent with a concussion, The Denver Post reports. When those symptoms surfaced, the Broncos said their medical team followed the NFL's mandated concussion protocol and decided Welker should not return to the game.

After Welker's concussion was announced, there were questions about how the Broncos responded. according to The Denver Post. But the medical team focused its initial evaluation on a neck injury.

On Wednesday, Welker stretched with the team but did not practice.

Tight end Julius Thomas, who sustained a knee injury Sunday night in the win over Kansas City, also sat out.

Safety Michael Huff made his debut with the team. Huff was signed after Rahim Moore was placed on season-ending injured reserve with a leg injury.

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