Jankowski came up in the 8th with runners on. He hit for himself and was completely overmatched. Any use of Jankowski that results in him going to the plate at all is a mistake. Using him in the 6th inning guaranteed that. This was a big mistake and Bell was bailed out because the CF couldn't catch Votto's warning track fly ball. Jankowski needs to be off the roster to prevent this type of stupidity. The Reds have Senzel and Shogo to play CF with Ervin in a real pinch. It's a waste of a roster spot to have another one who really isn't usable. The other OF positions are better manned by Aquino who is also a threat at the plate.
The Jankowski thing hasn't made much sense to me since they acquired him. Once Shogo was signed and Senzel was proven healthy enough, Jankowski became nothing more than an insurance policy to be stashed somewhere. Like all insurance policies, the hope is you never need to use it. The most distinguishing thing about Jankowski is that he looks like Bronson Arroyo, except Arroyo was a better hitter.