Cubs manager Dale Sveum calls it “mind-boggling” and “strange.”

“Just certain things you can’t explain,” Sveum said of his team’s persistent inability to turn excellent pitching into victories.

Peppered with questions about so-called clutch hitting, lineup shuffling and rethinking his platoons, Sveum engaged the media brainstorming efforts before the Cubs’ rain-interrupted, 4-2 loss to the Pittsburgh Pirates on Thursday.

“Your patience does run thin because you’re not doing anything [that’s getting results],” he said. “But you think about all those things.”

Often left out of the conversation about what’s wrong with the Cubs’ lineup is what’s not here yet.

From the highest ranks of the front office to the field staff in the clubhouse and the scouts in the field, the Cubs almost constantly talk about acquiring impact pitchers.

That’s because they believe they have impact hitters in the pipeline: infielder Javier Baez and outfielder Jorge Soler at advanced-A Daytona, outfielder Albert Almora and first baseman Dan Vogelbach at Class A Kane County.

Solving the problems with the big-league lineup won’t happen in any deep, substantive way until some of those projected core players reach the big leagues to join Anthony Rizzo, Starlin Castro, Darwin Barney and Welington Castillo.

Until then, most of the hitters on the 2013 roster are placeholders, for better or worse.

“You can say what you want about anybody,” Sveum said. “Those [Class A] guys are our core guys. Guys we want to hit in the big leagues. But they haven’t hit in the big leagues yet. So we can’t count on anything except the guys we got right now in this clubhouse.”