In Major League Baseball, what do the statistical abbreviations "SVO" "HB" & "GO/AO" stand for?

I thought I knew baseball, but they've come up with so many specialized stats that I can't keep up with them. I came across these abbreviations while looking up middle reliever Phil Coke on the New York Yankees website. I know SV means saves, but I can't figure out SVO, or the other two.