Blach was added to the Giants' 40-man roster Friday, Andrew Baggarly of the Bay Area News Group reports.
The lefty has made a quick rise since being drafted in the fifth round out of Creighton University in 2012, opening his third professional season at Triple-A Sacramento and holding his own in the PCL throughout the year. He may never strike out enough batters to be fantasy-relevant in mixed leagues, but Blach has shown great control and may be one of the team's top injury-replacement rotation options during the year.