In this piece I highlight seven infielders who will build off their 2017 breakouts. I want to clearly indicate how each player broke out and why they'll continue to improve. Since most of these players broke out after their age-25 season, the fantasy community is rightfully proceeding with caution on some of these guys. Travis Shaw had never been a sexy prospect, Justin Smoak underperformed his talent level for seven seasons, and Didi Gregorius was expected to regress after a solid 2016 show[...]