In the Phillies' 5-4 loss Wednesday, Herrera notched a pair of hits, including a home run that was scorched into the right-field bullpen.
"I guess I hit well in this park, but I don't really know what it is," Herrera said through an interpreter.
St. Louis hasn't been Herrera's only victim.
He reached base safely in a career-best 21 games, stretching from April 8 to April 30. Herrera became the first Phillie since 1900 to score four runs, hit a homer and get at least two stolen bases in one game, against Milwaukee on April 23.
"I'm really doing the same thing that I do every day," Herrera said. "I'm focusing on really swinging the bat well, and it's really working out for me."
Joe Harris is a contributor to MLB.com based in St. Louis.