In baseball, an extra-base hit (EB, EBH or XBH[1]), also known as a long hit, is any base hit on which the batter is able to advance past first base without the benefit of a fielder either committing an error or opting to make a throw to retire another base runner (see fielder's choice). Extra-base hits are often not listed separately in tables of baseball statistics, but are easily determined by calculating the sum total of a batter's doubles, triples, and home runs.[2] Extra-base hits are particularly valuable because they ensure that there will be no runners on base that will be forced to advance on the next fair ball.
Another related statistic of interest that can be calculated is "extra bases on long hits". A batter gets three of these for each home run, two for each triple, and one for each double. Thus, leading the league in "Most extra bases in long hits" is a significant accomplishment in power hitting.
The statistic Extra-Base Hits Allowed (for example by a pitcher or by the fielding team in general) is denoted by the abbreviation XBA.[1]