"We have to win this game," he said in Spanish. "I'm not working well on the field against St. Louis. I've played very poorly in this series."
Puig admitted his right ankle has been bothering him "for some time," but downplayed the effect it had on his performance in this series.
"I have a problem with my ankle, but I had to continue playing because we have to advance to the next round," he said.
Puig said he played through the discomfort down the final stretch of the regular season because he was hitting. He batted .339 in his final 15 regular-season games.
"When I go to look for the ball, my first step bothers me," he said. "But I'm receiving treatment."
Puig has struck out eight times in his last nine at-bats. In the Dodgers' 3-1 defeat Monday night, he tripled to end a streak of seven consecutive strikeouts.
Asked if he thought that triple would help him emerge from his slump, Puig laughed and replied, "It helped but I struck out in my next at-bat."
Puig said his slump is a credit to the Cardinals' pitching.
"They've pitched me from the middle of the plate to the outside," he said. "I knew they would do that, but I haven't been able to connect."
Puig was hit by a pitch delivered by
Puig said Mattingly didn’t talk to him about his decision to start
"I don't need him to talk to me about it," Puig said.
Puig said he will support his teammates.