Suarez is usually over 50% GB. And he throws a lot of pitches. When you face Strider you can sit on one pitch and theres almost a 50% chance you will be right. Hitting is about timing. Yes higher velocity is theoretically harder to hit but changing speeds so hitters cant time your pitches is important too. Thats why a 2 pitch pitcher is so often a reliever. So they dont get multiple at bats against him. Also how the ball looks coming out of the pitchers hand matters a lot. If a pitcher has great stuff but batters can pick up on the pitch coming out of his hand they will hammer it. Do you know why knuckleballs are so effective? Not because it moves so much but because it moves so unpredictably. If it had a ton of movement but was predictable it would be hit to orbit.