Bruce is sitting against a LHP. He has negative splits this year, but career has a 100 point OPS advantage against RHP.
Agree with giving Franco some more opportunities. If he does not hit though I would seriously consider trying to get him to AAA. He is not a good bench player with no speed and defense to speak of, so if he does not hit they really need to make Kingery the 3B and then some combination of Quinn, Haseley, and Williams filling the OF (with Harper and Bruce).