Cubs GM Jed Hoyer disappointed in rotation’s struggles

CHICAGO — Before Tuesday night’s game, Cubs general manager Jed Hoyer was clear about what has been the most disappointing aspect in an uneven start for the National League Central division favorites.

“When it comes to the pitching part of it,” he said. “I think that’s where it’s been difficult to get into a rhythm. Pitchers with good control and good command have struggled to throw strikes.”

As if on cue, Tyler Chatwood backed up those comments with a rare performance against the St. Louis Cardinals in a 5-3 loss: 4.2 innings pitched, seven strikeouts and seven walks. According to ESPN Stats & Information data, only two pitchers compiled at least seven and seven in less than five innings pitched last year. Before that, it hadn’t happened since 2008. It meant throwing a lot of pitches — 97 — in a short outing, not exactly what fielders want when the temperature is 35 degrees at first pitch.

“I just have to be better with my command,”…