Larkin's abs already had been issue
The team said Larkin would return to Cincinnati to be checked by team physician Dr. Timothy Kremchek.
The 40-year-old Larkin was making just his second start in a week because of a sore abdominal muscle. He cut across the diamond to field a slow hopper hit by Esteban German and didn't make the throw.
Larkin, in his 19th season with the Reds, went down on his knees, but eventually walked off the field. He has said that he will retire from playing after this season.
Larkin singled in his first at-bat, then hit a three-run homer in the second inning off former Cy Young Award winner Barry Zito.
Larkin flied out to right in his third at-bat before departing.
Copyright 2004 by The Associated Press