The Padres placed Carpenter on the 10-day injured list Friday with right elbow inflammation.
The move comes retroactive to Tuesday, so Carpenter will be eligible to return in a week. Carpenter has gone 2-for-10 with a homer, two RBI and two runs scored since the start of September, and he will be replaced on the roster by Ji-Man Choi (ankle), who was reinstated from the injured list Friday.