U.S. prospects blog: 10 Euro-based players with most to prove in 2015-16

Hertha Berlin defender John Brooks played well in the second half of last season. But can he put together consistent performances in 2015-16? Alex Grimm/Bongarts/Getty Images

With the 2015-16 European campaigns kicking off, a number of American youngsters are heading into hugely important seasons with their club teams. Here's a quick look at 10 Euro-based prospects 22 years old or younger -- all but one of them eligible for the U.S. under-23 squad that will attempt to qualify for the 2016 Olympics this October -- with plenty to prove this season.