For the short term, Morris also inherits the role of Sanchez, who became the long man in the bullpen following his removal from the rotation.
"My role is to go out and compete when my name is called," Morris said. "That's what I do."
In the two stints with the Indians, Morris posted five saves, allowing one earned run in 6 1/3 innings.
The disposition of Sanchez was expected. The 30-year-old veteran earned a job with a promising Spring Training as a non-roster candidate, but was not able to carry over the performance into the regular season. In four starts and one relief appearance, Sanchez allowed 25 hits -- including seven homers -- and 18 runs in 13 2/3 innings.
"The things we saw in Spring Training pretty much evaporated," manager Clint Hurdle said. "Unfortunately, he got back into survivor mode."
The designation gives the Pirates a 10-day window to try to move Sanchez or work out another alternative to his outright release. His $1,375,000 contract is fully guaranteed.
Tom Singer is a reporter for MLB.com and writes an MLBlog Change for a Nickel. He can also be found on Twitter @Tom_Singer. This story was not subject to the approval of Major League Baseball or its clubs.