The Los Angeles Dodgers promoted top prospect Gavin Lux, who was expected to make his major league debut at second base against the Colorado Rockies on Monday night. The lefty-hitting middle infielder began the season at Double-A Tulsa, where he hit .313 with 13 home runs in 64 games. At Triple-A Oklahoma City, he was hitting .392 with 13 home runs and 18 doubles in 49 games.