We may have found a new unwritten rule in Busch Stadium on Sunday. Either that, or Kyle Lohse is completely off his rocker.

Lohse allowed six singles to the first seven batters he faced in the fourth inning (including a bases-loaded squeeze beaten out by Pete Kozma), during which time he allowed four runs. That left runners at first and second, with one out, for pitcher John Gast.

Gast squared to bunt, but pulled the bat back at the last moment to swing away. This is not an unusual baseball move, especially for a pitcher, when the opposing third baseman is charging hard. Lohse, however, was irate, and threw three consecutive pitches high and inside. Gass eventually bunted into an out.

The act might have been explainable as an anti-bunt strategy had Lohse not immediately thereafter shared some heated thoughts with Cardinals third base coach Jose Oquendo, then continued the conversation with catcher Yadier Molina when he came to the plate the following inning.

“They know what I had to say,” Lohse said in an MLB.com report. “It had nothing to do with the squeeze or anything like that. It was something that happened after that. … I’ll leave it at that. They know.”

Ultimately, St. Louis Post-Dispatch columnist Bernie Miklasz may have offered the clearest-eyed viewpoint, speculating that Lohse was ticked that after five seasons in St. Louis A) the Cards didn’t keep him on their roster in favor of going with young pitchers, which B) left him first in free-agent purgatory and C) then with the last-place Brewers. There’s also D) the notion that Lohse is 1-5, despite pitching well this season, and that E) three of those losses have come at the hands of two of the young pitchers chosen by St. Louis to take his place—Shelby Miller and, last night, Gast. With that in mind, it makes sense that the pitcher’s fuse is a bit short. (Miller also did the square-to-bunt-and-pull-the-bat-back move against Lohse earlier in the season.)

On strictly baseball terms, given the information that’s currently available, Lohse doesn’t have a leg to stand on. (He also positioned himself as the anti-Nolan Ryan, who was known for drilling guys who tried to bunt on him. Lohse, it seems, was perturbed that a guy tried to not bunt on him.)

Lohse didn’t hit Gast, so no harm was actually done, but he was clearly pitching angry. It does not appear to be a retaliation-worthy offense, but stay tuned—these teams play each other nine more times this year.

(H/T Bill Ivie of I-70 Baseball.)