He came up, and immediately impressed last season. He is back with the San Francisco Giants this season, and has picked up where he left off.
Slater began the season in Triple-A for some reason. Clearly, it was not due to skill or performance. As the season begins, teams like to maintain organizational inventory. The San Francisco Giants are no different.
As a result, Slater remained in Triple-A while players such as Gregor Blanco and Derek Holland had to be added to the roster. It was a numbers game, really. And, that is not to say neither Holland nor Blanco were not deserving — they were.