Jason Heyward started his major-league career, at age 20, with a Cubs connection: he homered in his first big-league at-bat off Carlos Zambrano on Opening Day 2010, April 5 in Atlanta.
To this day, six seasons later, Heyward's 2010 home-run total of 18 is his second-best and the .849 OPS he posted that year is his career-best.
For someone as highly touted (Atlanta's No. 1 pick, 14th overall in 2007), Heyward has to be seen as somewhat of a disappointment. Injuries have kept him from 150-plus game seasons a couple of times, and even in 2015 when he did play 154 games for the Cardinals, his numbers were very, very good but not great: .