Drew Smyly is maintaining his humor through the disappointment of being moved back to the Chicago Cubs bullpen. The 24-year-old left-hander made three relief appearances before Marcus Stroman’s injury prompted the Cubs to return Smyly to the rotation. They saw enough in one start, a disastrous outing Tuesday in Detroit, to move Smyly back to the pen and look at other options for the fifth starter spot. “It’s like I never left, I guess,” Smyly said Friday at PNC Park.