ST. LOUIS –– Dodgers manager Dave Roberts said he had a “good feeling” about his slumping offense at the start of a six-game road trip Friday afternoon. “The road, ironically, has been better for us,” he insisted.  By the end of the night, however, that theory couldn’t have felt less true. En route to losing three straight games for the first time this year, the Dodgers star-studded lineup remained ice cold in a 7-2 defeat to the St. Louis Cardinals, managing just five hits against a Cardinals pitching staff with the fifth-worst team ERA in the majors. En route to losing three straight games for the first time this year, the Dodgers star-studded lineup remained ice cold in a 7-2 defeat to the St. Louis Cardinals Joe Puetz-Imagn Images For a fourth-straight game, the Dodgers (20-12) failed to hit a home run, their longest homer drought since June 2023. Joe Puetz-Imagn Images For a fourth-straight game, the Dodgers (20-12) failed to hit a home run, the longest homer drought for the club since June 2023.…