Lewis went 2-for-4 with a double and a solo home run in Saturday's 9-6 loss to the Cardinals.
The 27-year-old continues to rake since returning to the majors in early June. After an 0-for-3 showing in his first game back, Lewis has hit safely in six straight contests, batting .435 (10-for-23) with two doubles, three homers, four runs and four RBI. Five of those seven starts have come at first base, and that appears to be Lewis' new defensive home while Brooks Lee remains at third base.