CINCINNATI — Christian Koss was 14 years old when Buster Posey hit a grand slam off Cincinnati Reds right-hander Mat Latos in the 2012 NLDS, but he still remembers exactly where he was.

Buster Posey did the unthinkable on May 12, 2008, playing all nine positions in one game against Savannah State. Here's a look back at the catcher's unforgettable moment.

CINCINNATI (AP) — Buster Posey experienced his share of nervous ... Posey delivered one of the more memorable hits of his career with a grand slam against the Reds during the fifth inning ...