Flores (back) is starting Friday against the Cardinals, Maria I. Guardado of MLB.com reports.
Flores missed two consecutive games due to lower-back tightness, but he'll be back in the lineup after Thursday's scheduled day off. Over his last three games, the 30-year-old has gone 3-for-10 with a homer, a double, six RBI, two runs and two walks. He'll start at the hot corner and bat third in Friday's series opener.