The infield is now finished with the 2013 fantasy baseball rankings for third basemen. While doing these fantasy baseball rankings for third basemen, what became very apparent is that this is a position in dire straits. After Manny Machado at 18, the general quality of players at the hot corner falls of dramatically. The top is very heavy with Cabrera and company but dramatically falls off after Ramirez at 4. Coming into his 16th season, Adrian Beltre has lost quality hitters around him in the…