MINNEAPOLIS — Kyle Tucker’s disappointing first season with the Los Angeles Dodgers took a turn for the worse on Monday, when Tucker reached second base on a routine base hit from Tommy Edman and crouched on the bag in clear discomfort.Tucker was removed from the game in the second inning for a pinch runner, and the Dodgers quickly said that Tucker, who signed the richest contract in baseball history by annual value this winter, was dealing with lower back spasms.An inning later, they were dealt another blow when catcher Dalton Rushing exited “to rule out a concussion,” the Dodgers said. Rushing took a foul ball off his mask on Will Klein’s first pitch of the game but remained in the game and took an at-bat before being replaced by Chuckie Robinson in the third inning.Tucker was already struggling to gain traction in the first year of his four-year, $240 million deal. The 29-year-old outfielder drew a walk in his lone at-bat Monday against Minnesota Twins starter Zebby Matthews, raising his OPS on the season to .707. That figure ranks 110th out of 152 qualified hitters in the majors this season.He has looked very little like the four-time All-Star the Dodgers signed him to be, not just in production but in approach. He has seen a sizable jump in his aggressiveness on the first pitch, with the sixth-highest year-over-year increase in that metric in baseball. Tucker is swinging more in general, hacking at 48.7 percent of pitches he’d seen entering Monday, his highest mark since 2022. He has also chased more pitches than he has at any point since that season.