The Cubs came into this season believing they had the depth -- both in the Major Leagues and among their upper-level prospects -- to withstand unexpected setbacks and still remain firmly in a postseason chase.

Chicago Cubs outfielder Ian Happ (oblique) remains out of the team's starting lineup for Monday's series opener against the visiting Miami Marlins at Wrigley Field. Happ is being considered day-to-day with oblique discomfort,