Tolleson or Valencia vs a RHP would still be much better than Goins, probably.
Not to mention, Boxberger has a wicked changeup and probably has reverse splits.
small sample size but career against Boxberger:
RHB .314 wOBA
LHB .248 wOBA
Honestly there's no excuse for letting Goins hit in that situation. Just an ignorant manager and, more importantly, an ignorant team that doesn't care about the small things.