Perhaps Maddon is valuing Olt's contributions with his glove more than his bat for this game. Also, Olt did kind of earn the starting 3B job out of ST. Mostly by default because of Bryant's situation, but he had a really good spring and showed improved plate patience and discipline in the process. Not starting Olt after sending Bryant down after all the "It will be exciting to see what Olt can do during his time with the role" type stuff might also look sketchy, not that the FO really cares about that, but honestly I think Maddon just liked Olt at 3B more, and we can expect to see him start there most games, regardless of pitcher, while Bryant is down in Iowa. They need Olt to perform well so they can move him if they need to, so they should probably squeeze the most out of him that they can while he's got the job. Also I don't think Alcantara would do THAT much better against Wainwright than Olt that it's a travesty they're starting Olt.