Underwood is one of 22 pitchers in the Cubs' player pool working out at Wrigley Field for summer camp.
Underwood bounced between Triple-A and the majors in 2019, and he's now facing plenty of competition for playing time this season. The 25-year-old made 10 starts in the minors last year, so he could give the Cubs multiple innings out of the bullpen if he's called upon.