MLBPipeline.com's 2015 Top 100 Prospects list will be unveiled on Friday on MLB.com, with the Top 50 revealed during a one-hour show on MLB Network at 9 p.m. ET. Leading up to that, MLBPipeline.com takes a look at the Top 10 prospects at each position.
Graduations to the Major Leagues have taken a heavy toll on this list in the past year. Six of the second basemen on last year's preseason Top 10, including the top four, have lost their rookie eligibility, creating room for several newcomers.