Kotsay would be a bench bat. He's probably the best available to the Reds. Giambi would never play with Votto on board and I'm guessing his bat would lose its luster with so few PAs. The Braves aren't trading Eric Hinske. Jim Thome is in the AL. Kotsay should be available, cheap and still is fairly competent as a corner OF. He really shouldn't play more than a day or two a week to stay sharp, but he'd really help late in the game when the Reds are being owned by some righty reliever having his way with the Ludwick through Stubbs 6 through 2 part of the order.
He wouldn't fill their top need, but he'd be an upgrade where one is needed and could at least make the other team make a move.