Biscuits catcher Chairon Isenia spent the night at Baptist Medical Center South after leaving Riverwalk Stadium in an ambulance Friday.
Isenia was knocked unconscious for in an eighth-inning collision. X-rays at the hospital came back negative, but Isenia will miss at least a few days, the team's trainer said.
"It's tough to say right now," Mark Vinson said late Friday. "I think he'll be back before the end of the year. It's obviously going to be a few days before he plays again."
Isenia was unconscious for "about 15-20" seconds, Vinson said. The injury caused a 21-minute delay in the game and emergency personnel drove onto the field to tend to Isenia.
Vinson said Isenia was responsive and talking at the hospital, "but I don't think he remembers a lot about what happened." Isenia, who stayed overnight for observation, is one of the most popular players in the clubhouse and with Montgomery's fans.