Educating Twitter: Feared Leadoff Hitters

In terms of baseball, what does “dangerous” mean?

More specifically, in terms of hitters in baseball, what does “dangerous” mean?

Honestly, as I type this, I don’t know the answer, but that’s the critical question we have to figure out before we can judge whether or not this tweet from a few weeks back is accurate or not:

Okay, let’s start with the obvious…