Chicago Cubs: Kris Bryant

There's certainly an argument to be made for three-time All-Star first baseman Anthony Rizzo, whose January 2012 acquisition from the Padres made him the first major piece acquired in Theo Epstein's rebuilding effort. That said, the 2015 arrival of Bryant—the third pick of the 2013 draft, after the team lost 101 games the year before—heralded the team's turn toward contending. The slugging third baseman has taken home NL Rookie of the Year and MVP honors in his two seasons while helping the Cubs to back-to-back playoff berths, not to mention their first world championship in 108 years. 

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