How Cubs responded to Brett Anderson’s passive-aggressive shot on Twitter

PITTSBURGH – The Cubs gave Brett Anderson $3.5 million guaranteed, a clear spot in their rotation and the chance to pitch in front of what had been a historic defensive unit, making him the only guy on the Opening Day roster who hadn’t already earned a World Series ring.

The Cubs got close to a zero return on that investment, but those are the gambles teams take on the free-agent market with talented, injury-prone pitchers, hoping to catch lightning in a bottle.

Anderson put up an 8.18 ERA in six starts and accounted for 22 innings before going on the disabled list for the 10th time since 2010. It became out of sight, out of mind as the lefty recovered from another back injury, got designated…