"I'm a lot better," Infante said. "I ran and I didn't feel it. That's why I am playing today."
Infante feels he benefited by the team being rained out on Sunday at Washington and having an off-day on Monday.
Manager Ozzie Guillen said if Sunday's game wasn't washed out, Infante likely would have started. Infante pinch-hit on Saturday.
Infante has been one of Miami's hottest hitters, batting .325 with four home runs and six RBIs.
"He said he's fine," Guillen said. "I asked about the weather. He said he was ready to go. That's the reason he is in the lineup. I don't expect any setbacks."