milks
I hate football
Number 2 is up for grabs (from Hibbert) and hopefully Gibson will lose number 4 and McGeady, Oviedo and Kone to lose 7, 8 and 9 respectively. Some big numbers to be had!
Give Funes Mori the number 2 (Seamus will stay 23 as it appears to be a lucky number for him) and move Jagielka to 4, freeing up number 6 for a big-name central midfielder. I'd personally like Deulofeu to take over the 7, Ross to be given the 8 and Lukaku number 9.
This is quite possibly the least important thing in the world. Seriously, haven't you got anything more worthwhile to do with your time?
Players don't tend to change number due to the negative impact on kids with numbered shirts.