noun
Baseball term for a batter known for hitting long balls and driving in runs.
彼はチームの長距離打者として期待されている。
He is expected to be the team's slugger.
強打者 is a more general term for a powerful hitter, while 長距離打者 specifically emphasizes home-run hitting ability.
Compound of 長距離 (long distance) and 打者 (batter), literally 'long-distance batter'.