I think there's a lot of reasons that a manager wouldn't do it. Some of these guys who should be platooned are getting everyday starter money. Some guys still put up such great numbers on their split, that their weakness isn't exposed as much. In some cases, a player can make the all star team even though they shouldn't be batting against particular pitchers. Some managers don't pay attention to splits. The Cubs completely ignored it last year with Jones. They seem to be more interested in BA w/RISP than vs. LHP or vs. RHP. I disagree that platoons are only for mid to small market teams. I believe the Yankees were employing platoons for an aging Paul O'Neill and Scott Brosius during their World Series runs. I want to say they also slowly groomed Cano into his everyday job with a platoon. Melky Cabrera is another guy that they could give a start to occasionally because his splits might be better than one of the other OF's. A platoon can keep your bench guys sharper at the plate. It gets them more involved with the games. Who didn't like the Henry Rodriguez/Glenallen Hill platoon? If you can't get a stud player that can hit RHP and LHP equally well, the next best thing is to get 2 guys at equal or less cost to do the same. The other thing a platoon provides is depth. Last year is another perfect example for the Cubs. The Cubs had no depth whatsoever. If Murton got hurt, who plays in his place? Angel Pagan? Freddy Bynum? John Mabry? None of those guys have shown they should get quality playing time. Signing a guy like Cliff Floyd might push Murton to the bench more often than if he wasn't here, but what Floyd brings with the bat is more than likely going to be more productive than what Murton can bring with the bat against RHP. Now you have a stud player that will still get plenty of PT. And if someone gets hurt, you don't lose a single step. Floyd can even play some 1b, and I can't even begin to tell you how much more valuable a guy like Floyd is when you compare him to John Mabry. If you sign Floyd, yep, he's probably going to take at bats from Murton. But, a platoon allows you to keep your starting guys rested more, gives the bench guys more PT to keep them sharp, and just gives the team many more options over the course of a season. And one of those options is trade value at the deadline. If Floyd is tearing it up and Murton is having an all star caliber season, Floyd becomes a nice trade option. Same can be said of Jacque Jones. When Cleveland was in the heart of their mini-dynasty, they were employing platoons. They had so much talent, they could afford to.