Discovered Blood during a TO

[just another ref]

I'm looking at it this way. If a stoppage of any kind is already in progress, there is no "game" for the player to leave. I see a kid standing in the huddle with blood on his arm. Before I can say anything, the trainer wipes off the blood and applies a bandage. By the time the "game" resumes, he's ready to go.

Isn't a timeout a part of the game? Maybe so, but even if it is, the player doesn't have to leave it.