Coach:
I found this bit from Rob Neyer, which kind of supports what I was going to suggest:
"As one of the by-products of this research, I've identified 18 submarine pitchers, including Kim, in the major leagues or the Negro Leagues. I'm sure there are more, perhaps many more, but I do think we've found all of them with substantial careers. And looking these submariners, it's pretty apparent that Kim is a sort of pitcher that we haven't seen in a long, long time.
"Submariners generally fall into the same class, pitch-wise. Most of them throw a sinker or sinking fastball (sometimes those terms describe the same pitch, sometimes they don't), along with a curve or (less commonly) a slider. In the 1930s, Elden Auker threw a sinker and a curve. In the 1970s, Kent Tekulve threw a sinker and a slider. In the 1980s, Dan Quisenberry threw a (slow) sinker and a curve. Today, Chad Bradford throws a sinker and a curve.
"The single feature common to every submariner since Auker is a lack of velocity. Yes, all these guys threw "fastballs" of one sort or another, but they weren't fastballs (if you take my meaning)."
The key point here is that a true submarine ball pitcher does not match up with the scary prospects of an exaggerated sidearmer, like old Ewell Blackwell who threw what thet called "crossfire" fastballs, very intimidating to same-handed hitters and away from opposite-handed hitters.
The true submariner is at his best when he sacrifices speed for movement and location, since the ball will tend to drop away from the power zone. A submarine guy going to blow it by hitters will invariably get the ball up into the hitter's wheelhouse; and that's when the wheels come off. It also saves his arm and an effective submariner will have few arm troubles if he doesn't strain for power.
A more recent guy like Myers was at his peak more a crossfire pitcher, now tranformed more into a sub.
Rob Neyer