Ok, well, setting aside our personal opinions, I don't think ANY manager is starting Andrew Vaughn at 3B vs a team as good as SD(or really any team) where the defense is the difference.
Boagarts gets two diving plays, saves two runs.
I mean, you could also look at the fact he hasn't played there is whole career, a poor defensive 1B with 68 innings, almost all coming this year... at 3B seems like a bad idea, but... sure.