The final day of the Cubs' road trip provided some postgame fireworks as Matt Garza sent a warning to Reds pitcher Johnny Cueto after an alleged purpose pitch.

Garza, who lasted only four innings in the second start of his comeback, said the league should investigate an incident in which Cueto threw a pitch over the head of David DeJesus in the sixth inning.

"It's kind of b.s. on his part, just totally immature," Garza said. "If he has something to say about it, he knows where to find my locker and definitely I'll find his. I took total disrespect out of that one."

The Cubs came back from a four-run deficit to beat the Reds 5-4 in 10 innings, ending a six-game losing streak in surprising fashion.

After the pitch over DeJesus' head, plate umpire Bob Davidson issued a warning to both teams before Garza issued one of his own.

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

Garza said DeJesus "plays the game the right way" and didn't deserve the purpose pitch.

"If Cueto has any problem, he can throw at me and I'll definitely return the favor," he said. "I didn't like that one bit. We don't retaliate. We just take it game by game and try to better ourselves. Hopefully he learns to grow the hell up. ... You're up 4-0. Grow up. I hope he hears this because I really don't care."

Manager Dale Sveum said DeJesus apparently annoyed Cueto by stepping out of the box before a pitch in the first inning. He said Davidson told him Cueto was "goofing around trying to throw over his head."