John McDonald (back) is also dealing with a right elbow injury.
Pirates placed INF John McDonald on the 15-day disabled list with lower back discomfort.
John McDonald left Tuesday's game against the Brewers with lower back discomfort.
Pirates acquired INF John McDonald from the Diamondbacks for a player to be named later.
FOX Sports' Ken Rosenthal reports that the Pirates have acquired infielder John McDonald from the Diamondbacks.
FOX Sports' Ken Rosenthal reports that the Diamondbacks are looking to trade infielder John McDonald.
John McDonald homered and singled in a run against the Dodgers on Sunday.
Diamondbacks activated INF John McDonald from the 15-day disabled list.
John McDonald (oblique) began a rehab assignment Thursday with the Diamondbacks' rookie-level Arizona League team.
John McDonald (oblique) could be activated from the disabled list by the end of the week.
Diamondbacks placed INF John McDonald on the 15-day disabled list, retroactive to June 25, with back tightness.
John McDonald was a late scratch from Saturday's starting lineup against the Brewers due to tightness in his back.
John McDonald went 2-for-4 and hit a three-run homer in the Diamondbacks' 8-5 defeat of the Brewers on Saturday night.
Diamondbacks signed INF John McDonald to a two-year, $3 million contract.