The Pirates called up Jose Osuna yesterday to replace Starling Marte on the active roster. For now, we can assume that Osuna will be up until Marte returns, or unless the Pirates add someone from the outside.
When a prospect is promoted to the majors for the first time, we always do an article that details their game on both sides of the ball. We cover these prospects from the day they enter pro ball all the way through their promotion to the big leagues, and all of the information we have goes into that article. In the case of Osuna, we've been covering him for seven seasons, with the 2017 season being number eight.