The only time, I have seen sweatshirts/jackets become an issue, is when a hood is on the back. But, I think that was only once. I offered to tuck the hoods, but the ump didn't like that either.
The rule requires the numbers to be on the uniform jersey. A sweatshirt is not part of the uniform.
I have always told players and coaches to do what they needed to in order to keep warm/dry/etc.
If a question comes up regarding numbers and players, we deal with it at the time.
The entire purpose of requiring numbers is so that the defense knows who is at bat. Period. So regardless of what the outer layer top is, it is required to have a number. With that said, if the defense doesn't care, neither do I.
Name trumps number because it is very unlikely a coach wrote the wrong name next to the right number. It's a careless mistake by most coaches to put the wrong number. The only ones that are halfway excusable are the teams with multiple uniforms with different numbers on them. There is a local HS coach that has his players trade jerseys before playoff games because many opponents can only recognize his players by number.Of course this is the part of the rules I have never been able to figure out. The rules require the players to have a number, the number must be visible on the uniform and must be listed on the lineup card. But, by rule it is the players name, not the number that is significant. As long as the correct name is at bat the number is insignificant and the coach can correct the lineup card.
Considering everyone identifies the players by their number and is how they are tracked on the field and in the batting order, you would think more emphasis would be placed on having the correct numbers listed.
Name trumps number because it is very unlikely a coach wrote the wrong name next to the right number. It's a careless mistake by most coaches to put the wrong number. The only ones that are halfway excusable are the teams with multiple uniforms with different numbers on them. There is a local HS coach that has his players trade jerseys before playoff games because many opponents can only recognize his players by number.
Do NFHS rules still restrict the head coach to the dugout if their lineup card has to be corrected more than once? I only have a copy of the 2011 rules...