According to MLBTR:
Playing in 2012 for the Cubs, Mather appeared at all three outfield positions, both corner infield spots, and even pitcher. Seeing his most extensive big league action last year, Mather logged a .209/.256/.324 line over 243 plate appearances. Now 30, the former third-round pick of the Cardinals began this season in the Atlantic League with the Lancaster Barnstormers after being released by the Phillies during spring training.
So yeah. Apparently with the Mark Teahen thing not working out, this is what we're stuck with. Let's hope he likes Pensacola enough to want to stay there for a while. I'm not sure how I feel about a former Cardinal AND Cub.