What kind of injuries does a soccer shin guard prevent? Is there any other uses for soccer shin guards?

I know that soccer shin guards can help prevent shin splints, but what other injuries can these shin guards prevent? Also, is there any other uses for soccer shin guards besides protection?
I might be mistaken. Shin guards might not be able to prevent shin splints.

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What kind of baseball bats do most international baseball leagues use?

I am curious to know what kind of baseball bats most international baseball leagues use. I know here in the United States that for the major league level, they use wooden bats and for the college level they can use aluminum. I’m trying to figure out what they use at the highest level possible for most international baseball leagues such as Japan, South America, etc. Any help would be greatly appreciated!

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