2015 Outlook: Even the savvy owners who targeted Rendon as a source of late-round value in 2014 had to be surprised by the return on their investment last season, as he became a five-category monster in his breakout campaign. The most unexpected part of his coming-out party may have been his work on the basepaths, as Rendon finished 17-for-20 on stolen-base attempts after swiping just eight on 10 attempts in his previous two seasons as a professional across all levels. After opening the season as the Nationals' primary second baseman, Rendon shifted over to third base when Ryan Zimmerman hit the disabled list, and he'll remain at the hot corner in 2015 as Zimmerman transitions to first base following the departure of Adam LaRoche. In addition to carrying similar lines against lefties and righties, Rendon showed no signs of slowing down over the course of the second half. He'll reprise his role as the Nationals' No. 2 hitter this season in what figures to be an excellent lineup.
2015 Outlook: The Nats let Asdrubal Cabrera walk in free agency, but it was never realistic to think the defending NL Central champs would go into the year with Espinosa as their primary second baseman. Espinosa's continued inability to make regular contact has tanked his value and will put him behind Yunel Escobar on the depth chart to open 2015. At his best -- a term used loosely in this particular instance -- he was striking out more than a quarter of the time, but he somehow managed to blow that out of the water in 2014 with a 33.5 percent strikeout rate, third-highest among batters with at least 350 plate appearances. Even Dan Uggla was embarrassed for him. Over his career, he has averaged 18 home runs and 15 stolen bases per 162 games, but with a triple slash of .228/.299/.387, Espinosa will struggle to find enough playing time to get even half of those totals. At 28, this is who he is.