New Numbers!

Wow did I stumble upon a gold-mine of data. Baseball-Reference apparently keeps track of the league-wide numbers I've been searching for.

So far, in 2009, there have been 161474 plate appearances across Major League Baseball.

89044 (55.1%) have come with the bases empty
29045 (18.0%) have come with a man on 1st
14155 (8.8%) have come with a man on 2nd
4798 (3.0%) have come with a man on 3rd
11642 (7.2%) have come with men on 1st and 2nd
4851 (3.0%) have come with men on 1st and 3rd
3557 (2.2%) have come with men on 2nd and 3rd
4382 (2.7%) have come with the bases juiced

These numbers are a little different from the sketchy ones I used a few months ago. The coefficients for Bases Advanced will be adjusted slightly, and frankly, since I don't know how to account for productive outs, I'm taking out the parts with sacrifices and sac flies (since those are only positive since there happen to be men on base).

Bases Advanced

= 1.44*(BB + HBP) + 1.82*(1B) + 3.29*(2B) + 4.45*(3B) + 5.45*(HR) + SB