you could be right that it is a cockerel. I forget that at 10 weeks, they are still a rather small bird. 10 weeks, that's 70 days.
here is my RIR at 61 days old....
https://www.backyardchickens.com/breeds/images/rhode_island/rhode_island-10071-275580.jpg
and again at 81 days old...
https://www.backyardchickens.com/breeds/images/rhode_island/rhode_island-10071-649854.jpg
here is my RIR at 61 days old....
https://www.backyardchickens.com/breeds/images/rhode_island/rhode_island-10071-275580.jpg
and again at 81 days old...
https://www.backyardchickens.com/breeds/images/rhode_island/rhode_island-10071-649854.jpg