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Just checked, Hannahan's career LD rate is 22%. Pull up B-R and sort 2009 MLB Batting by LD%. That's upper echelon in MLB.
Of course LD% isn't EVERYTHING. You see a lot of very good hitters with mediocre LD%s. But if I'm a coach and I see a guy consistently ringing line drives around, I might be wondering what I can do to fix this guy so more of them drop in.