The comb is big for 10 weeks, but the main thing is the patchy coloring on his back. The deep red patches on his shoulders are the biggest giveaway. He will be a very beautiful rooster, no doubt about it.
Okay, I think the 5th toes are enough to confirm it's a silkie cross. Phoenix is a good a guess as any for its other parent, but could be many things. Could be a mix of birds that are already mixed, too. It is definitely a cockerel.