The Pittsburgh Pirates made a surprising move on April 21st last year, promoting infield prospect Rodolfo Castro to the majors. The move was a surprise due to Castro being slated for Double-A at the time. It made sense, as the Pirates only needed a replacement for a brief time, with Castro only appearing in one game.
The bigger surprise came on July 6th, when the Pirates called Castro up from Double-A. This time, Castro got into some games, hitting three home runs in his first week in the majors. The Pirates also had called up Max Kranick to pitch in an extended role around the same time, with Kranick spending very little time in Triple-A before the call.