I have been watching the rugby on TV, and notice that a lot of players seem to have a little bump between their shoulders. I have looked at various websites to see if it is some sort of protective gear, but found no answers. Anyone know what they are?I have been watching the rugby on TV, and notice that a lot of players seem to have a little bump between their shoulders. I have looked at various websites to see if it is some sort of protective gear, but found no answers. Anyone know what they are?

They are small devices used to monitor players, heart rate work rate, running speed/effort etc. this article should explain it

Those are the players' heads.

I agree with jack