That description fit the bill for a number of Cubs pitchers from the 00s to 10s, namely Marmol, Farnsworth, Samardzija, Zambrano, and Clement. The problem was, those guys all had a tendency to air it out in big moments rather than trust their natural movement. Zambrano was the one it reminded me of. When he got too amped up and started throwing 96-97 he didn't get as much drop on the sinker and got hit harder. From what I remember, Marmol was more over throwing the sliders that would start missing a foot outside or bounce in front of the plate.