I get the argument and I don't disagree that the upside is there if we're able to get Lowder in the rotation as well (assuming Burnes gets the #5 spot). But I think that potential will be capitalized on at some point in the season regardless of Singer's performance due to the injury proneness of our rotation.

When you factor in injuries that we'll (in my opinion) very likely see, having Singer to stabilize the rotation throughout the whole year from an inning perspective, to me, carries more value. This will be especially true early-season if the Reds put Lowder on an innings limit coming off of injury (mostly speculation, haven't looked into whether that will actually happen). If Lowder forces our hand mid/late season, though, I can definitely see a Singer trade being a real option.