Star Silver 1990 actually featured three different Cubs, Mark Grace, Jerome Walton, and Mike Harkey. I've already featured Grace and Walton, so I thought Mike Harkey should get his turn.
Mike Harkey had a great season in 1990 as a 23-year-old rookie. He spent the season in the starting rotation and was 12-6 with a 3.26 ERA. But in April of 1991, Harkey injured his shoulder and ended up missing the season after surgery in May. His once promising career never really got on track after that and he was finished in the majors after 1997.