Every US commentator is pronouncing it as Christian Brown and they shouldn’t be because last time I checked there’s no A or U in the word Brown. It should be pronounced like the word brawn (as in physical strength). I’ve been to school with kids with same surname and they definitely didn’t pronounce it Brown. What’s the story here?
He’s pronouncing it the German way. English speaking countries tend to Anglicise the pronunciation to sound like ‘brawn’, but in other countries (like Japan) it retains its German pronunciation.