One on One: Cubs reliever Trevor Cahill

Chicago Cubs' Trevor Cahill works against the Milwaukee Brewers during the first inning of a baseball game Tuesday, Aug. 16, 2016, at Wrigley Field in Chicago. (AP Photo/Kamil Krzaczynski)

Chicago Cubs' Trevor Cahill works against the Milwaukee Brewers during the first inning of a baseball game Tuesday, Aug. 16, 2016, at Wrigley Field in Chicago. (AP Photo/Kamil Krzaczynski)

Mark Carman sits down with Cubs right-hander Trevor Cahill, who talks about the challenge of always staying ready in the bullpen, his approach to shaking off a bad outing, flipping the switch between “starter” and “reliever” mode and more.