SEATTLE — With their playoff hopes flickering and the baseball industry’s top pitching prospect forcing the issue, the Seattle Mariners promoted Kade Anderson directly from Double-A Arkansas to make his major-league debut on national TV, against a potential MVP-driven lineup, in front of a sellout crowd.Welcome to The Show.Chicago Cubs superstar Pete Crow-Armstrong popped up Anderson’s first pitch, a 94.7 mph fastball, as the youthful lefty began what the Mariners hope will become a special career. The early returns were encouraging, if not overwhelming, but the ending to Saturday’s 5-4 walk-off win over the Cubs at T-Mobile Park made it especially memorable.“It was just a blast out there,” Anderson told reporters after giving up three runs in 5 2/3 innings and getting a no-decision. “There’s obviously going to be some jitters, but I feel like I controlled them pretty well and got through those pretty quick.“At the end of the day, it’s just another game. I feel like when you have that mindset, it calms the nerves.”Anderson, who grew up in Louisiana and turned 22 last month, needed only two seasons at LSU to establish himself as the No. 3 pick in last year’s MLB Draft. He underwent Tommy John surgery in 2022, missing his senior season of high school baseball and working his way back into form in the highly competitive SEC.