What happened: Pittsburgh Pirates shortstop Konnor Griffin will begin a rehab assignment with the Double-A Altoona Curve on Wednesday, his first game action since May 30. The 20-year-old has been sidelined for nearly a month with a forearm injury that limited his throwing, and manager Don Kelly confirmed the assignment to reporters. Griffin had served as a designated hitter on May 29 and 30 before the team opted for caution and an IL stint.

Why it matters: Griffin is central to Pittsburgh's lineup, having signed a nine-year, $140 million extension as the franchise cornerstone. Without his five-tool presence at shortstop, the Pirates have slipped to 39-40, and his return is viewed as a difference-maker for a team fighting to stay above .500. Evaluators found no structural damage, framing the absence as rest-driven rather than long-term.

What to watch: Watch how Griffin handles throwing in game reps at Altoona; one local report suggests he could rejoin the Pirates during the upcoming home series against the Cincinnati Reds. Pittsburgh faces the Seattle Mariners and Reds before road trips ahead of the All-Star break.