This article is part of our Minor League Barometer series.
The final Minor League Barometer of the season will serve as a summary of the biggest risers and fallers of the 2017 campaign. We will highlight prospects that have taken their game to new heights and those that have fallen short of expectations. As always, not every prospect can be mentioned. In addition, phenoms already making waves in the big leagues, such as Cody Bellinger and Rhys Hoskins, have been omitted.
Ronald Acuna, OF, ATL – The Year of Acuna won't finish in the major leagues, but the teenaged phenom will enter the 2018 campaign as the top prospect in all of baseball. Acuna tormented minor league pitching in 2017, arguably getting better with each subsequent promotion. He started in High-A with a slash line of .287/.336/.478, hitting three home runs while stealing 14 bases in 28 contests. The Braves aggressively pushed Acuna to Double-A, where he rewarded the organization by hitting .326/.374/.520 with nine home runs, 30 RBI and 19 steals in 57 games. Acuna then took his talents to Triple-A Gwinnett, where he's hitting .344/.393/.548 with nine home runs, 33 RBI and 11 steals in 54 games. In sum, Acuna hit .325 with 21 home runs, 82 RBI and 44 steals across three levels in 2016. He has elite speed, emerging power and an uncanny ability to make contact. He will perform in the Arizona Fall League with an eye towards seeing the big leagues in 2018. The only question will be if the Braves