This obviously isn't in the same category as Chipper Jones retiring, but Sheets was a great talent before his career was torn apart by injuries. He spent his best years in the NL Central, with the Brewers, and I'll remember his curveball as being a really terrifying pitch, especially early in his career.
He's started eight games for the Braves this year, but at 34 and with a long, long injury history behind him, it's hardly a surprise that this would be it. He hasn't pitched since August, and should only pitch a couple innings tomorrow. He'll finish his career with at least 1323 strikeouts over 1595.2 innings.