3. RHP Nick Burdi
Reliever Nick Burdi made the 26-man roster in mid-May and he only made three appearances before getting his appendix removed less than two weeks into his stint. He has been working on a comeback since and the Cubs were hoping he'd be a contributing reliever. Although he gave up 3 earned runs in his small sample size, Burdi regularly touched 100 mph and struck out four batters.
MLB currently has Burdi's expected return as to be determined so it is up in the air whether he will return this year. The 30-year-old has only appeared in 19 big-league games so hopefully, he can become a contributor soon. His velocity is intriguing and needed in the Cubs bullpen.