Lopez has a good arm and is still learning how to use it. He's throwing strikes much more consistently now than in his past, and as they begin to become better strikes, he'll be more effective. The curveball is a second potential above-average, maybe even a plus, pitch. The change-up, or lack thereof, was puzzling. I had it classified as a two-seam fastball for the first few innings until I asked his teammate if he threw a change-up and was informed that he had been throwing it all along. Regardless of pitch classification, Lopez didn't throw anything off-speed to keep hitters honest or combat left-handed hitters. The fastball/curveball combo give him the start of a mid-rotation starter package, but until he comes up with something soft to throw, it's a middle-relief profile.