Pirates placed Ryan O'Hearn on the 10‑day injured list after he pulled up and grabbed his left leg while running to first base on a groundout in the ninth inning of the 8‑7 loss to the Cincinnati Reds. The injury is a strained left quad, expected to sideline him for 6‑8 weeks. Manager Don Kelly and a training staff member helped him off the field.

Signed in January to a two‑year, $29 million free‑agent contract, O'Hearn is batting .270 with 17 home runs and 69 RBIs in 96 games. He missed two weeks in May due to a right quad injury and has appeared in 49 games at first base, 42 in right field and 17 as the designated hitter.

He homered three times and set a Pirates single‑game franchise record with 10 RBIs against the Atlanta Braves on July 7. That performance highlighted his power potential despite the quad issues.

In other moves, the Pirates recalled right‑hander Isaac Mattson from Triple‑A Indianapolis, activated catcher/first baseman Rafael Flores Jr. from the IL and optioned right‑hander Antwone Kelly to Triple‑A.