Campusano was scratched from the lineup for Sunday's game against the Blue Jays due to abdominal soreness, Jeff Sanders of The San Diego Union-Tribune reports.
The 28-year-old was penciled in to start behind the plate Sunday but was instead replaced by Rodolfo Duran due to the injury. Campusano will now have five full days to recover before the Padres start the second half of the season Friday in Kansas City.