Jeff Passan at Yahoo mentions that Jackson has an historically high BABIP of .413 See Think you know baseball? No, you don’t.
It would be the highest since 1924. Jackson has a .161 AVG on balls in the infield according to Baseball Reference. But the league average is just .080. If we take half of his infield hits away, say 15, he then would be 16 for 191 on infield balls. That would lower his BABIP from 164/398 = .412 to 149/398 = .374. Still very high, but maybe not as historic.
He is fast with 10 3Bs this year as a RHB while stealing 24 with only 5 caught stealing. Maybe he beats out more grounders than average.
His average on hits to the outfield is .649 while the league average is .545. So he is above average here but not relatively as much as as in the infield. His GB/FB ratio is just about 2.22-1 while for the league it is about 1.23-1. Line drives are 27.3% of his non-bunt ABs while for the league it is 19.1%. His AVG on line drives is just about the league average, .722 vs. .725. So if you hit alot more line drives and you are fast, maybe you get a high BABIP. He strikes out 25.7% of the time while the league average is 17.5%. Maybe he just swings real hard, too.