Pro Athlete, Sports Player, Professional Athlete
noun
Remember how 手 can mean "doer" in some words? Well this is one of them. In sports, you must choose the best doer for your team. In the world of sports, these "chosen doers" are the pro athletes and sports player s.
せんしゅ
The reading for 選 is what you'd expect. 手 is the on'yomi reading as it is every once in a while, especially when it has to do with representing a person, so you'll have to remember that. I think you've seen 手 using this reading enough to be able to remember it, though.
あのハンサムな選手は誰ですか。
Who is that handsome pro athlete?
彼はメジャーリーグでプレイする日本人のプロ野球選手です。
He is a Japanese professional baseball player who plays in Major League Baseball.
ダルビッシュ選手からサインをもらいました。
I got an autograph from a player named Darvish.