text: Walks and hits per inning pitch.  This is more or less the number of baserunners a pitcher allows an inning... this is also considered a more accurate representation of how good a pitcher is (much more so than ERA).\n\nA excellent WHIP is 1.00 or under; usually only the top closers and maybe one or two starters have WHIPs this low.  A WHIP of 1.50 I'd think would be average, anything above that is... not very good.