By now you know that the Chicago Cubs are in search of pitching to augment their position-player prospect base. The Cubs could fill out a starting eight of prospects -- and then some -- but finding a five-man rotation to help them compete in the coming years is still a work in progress. Any fan knows this by now, and when the Cubs traded Jeff Samardzija and Jason Hammel earlier this season, that task became larger. Jake Arrieta is coming along, as is Kyle Hendricks, but neither is worthy just yet of World Series Game 7. We don’t even know if the Cubs have Series starters 1 through 6 on the team, or in the system, right now. They need plenty more and have acknowledged as much. The plan is to keep acquiring as much pitching talent as they can while looking for that big fish. “We’ve been open about the fact we’d like to add an impact pitcher,” team president Theo Epstein said recently. “If you look over the next 18 months or so, it’s certainly a priority for us. “Whether we develop one from an unlikely spot like Jake Arrieta or acquire someone who’s already at those heights remains to be seen.” In the meantime, the Cubs are taking advantage of their position in baseball. As one of the majors' worst teams, they get early claim on players going through waivers -- where priority goes in reverse position of the standings. So in recent weeks, the Cubs have grabbed Felix Doubront from the Boston Red Sox and Jacob Turner from the Miami Marlins.