I'd much rather let Olt tread water in hopes of figuring it out then call up Donnie Murphy Jr. It's not doing anyone any good keeping Olt on the big club at this point, especially since he's not getting consistent PAs. He's almost certainly doomed, but if there's even a glimmer of hope, he needs to get PAs. His confidence has to be in tatters, so there's not really any harm in sending him down. It may have to wait until the deadline, but I say jettison Barney, send Olt to Iowa and let him play 1B, make Valbuena the full time 3B (which he already is for all intents and purposes) and call up Alcantara and give him 2B. Agree on all. Maybe you can still trade Barney to someone who desperately needs late-inning defensive help at 2B.