Anyone doubting whether there’s any life left in this Cubs team – or wondering why Matt Garza could fit into the organization’s long-range plan – should listen to this.

Still ticked off even after Sunday’s 5-4 comeback victory over the Cincinnati Reds, Garza sent a message to Johnny Cueto at Great American Ball Park: “Hopefully he learns to grow the hell up.”

The pitch Cueto sailed over the head of David DeJesus toward the backstop woke up the Cubs dugout and forced home-plate umpire Bob Davidson to issue a warning in the sixth inning. Teammates and coaches love the adrenaline rush from Garza, who fired his own warning shot through the media.

“Cueto should learn you don’t go after guys’ heads,” Garza said. “Don’t wake a sleeping dog and I think that’s kind of immature on his part and totally uncalled for. He’s lucky that retaliation isn’t in our vocabulary here.

“That’s kind of BS on his part. Just totally immature. If he has something to say about it, he knows where to find my locker and definitely I’ll find his.”

It took 10 innings, with Alfonso Soriano posing at home plate and admiring his game-tying, two-run shot in the eighth and Kyuji Fujikawa walking off the field in the ninth toward the disabled list with an injury similar to the forearm strain he suffered in April.

But the Cubs snapped a six-game losing streak and showed maybe a 19-30 team can set off some fireworks during this week’s crosstown circus with the White Sox. Cueto apparently didn’t like the way DeJesus had been taking his time stepping out of the batter’s box.