Shortly after announcing a plethora of trade-deadline additions to their bullpen Monday, the Pittsburgh Pirates placed right-handed pitcher Mitch Keller on the 60-day injured list with a teres major muscle injury to his throwing arm. The move effectively ends Keller’s 2026 season, as he would be ineligible to come off the injured list until after the Pirates’ Sept. 27 regular-season finale. Keller, 30, is the Pirates’ longest-tenured player, having been selected in the second round of the 2014 MLB Draft. Since he made his MLB debut with the Pirates in 2019, Keller is 48-73 with a 4.60 ERA in 187 appearances. Eisert, acquired from the Chicago White Sox on July 11, made seven appearances for the Pirates, going 0-1 with a 7.71 ERA before being sent down to the minors July 29.