Actually, Nelson's plate discipline has been pretty bad this year. Currently Nelson and Duffy have almost the same O-Swing% at around 31%. Nelson has been making contact with those bad pitches 61.5% of the time, which probably has resulted in a lot of weakly hit balls for outs. It's hard not to feel bad for the guy. Some bad luck leads to not getting a hit, which leads to pressing at the plate, which leads to some bad at bats. It's kinda snowballed on him, and I think putting pressure on him by adding Catalanotto will only make it worse. Hopefully he can turn it around, but as we saw with Turnbow, sometimes the problems that are in your head are the hardest to address.