Sergio Romo and the Tim Wakefield Fastball
Earlier in the regular season, I got a message from a pitcher asking about how his slider rate compared to that of a teammate. It seems they had something of a friendly wager. I checked and replied that, while his slider rate was high, and higher than his teammate’s, neither was close to the league lead. Way up top were guys like Luke Gregerson and Sergio Romo, who threw sliders with nearly two-thirds of their pitches. Romo, for example, threw sliders like Clayton Kershaw threw fastballs. Romo’s got a pitch, and he’s especially got that pitch against right-handed batters.
Now let’s take a step back. Between 2007-2011, Tim Wakefield posted a roughly league-average ERA over nearly 800 innings. The overwhelming majority of his pitches were knuckleballs, a very small minority of his pitches were curveballs, and just over ten percent of his pitches were fastballs. His fastball had the average velocity of another guy’s slow curve. It was, in isolation, a very bad major-league fastball. Yet, on a per-pitch basis, between 2007-2011, Tim Wakefield’s fastball was one of the most effective fastballs in the league. You don’t have to do much research to figure it’s because hitters were taken by surprise. The fastball seemed faster than it was, and it was often simply unexpected. Nearly three in four Wakefield fastballs were strikes. There was nearly an equal ratio of called strikes to swings.