マウンドで、ピッチャーが右腕を大きく振ってボールを投げており、その後ろで走者が走り出すタイミングを伺っている
The pitcher extends his body to throw a pitch,baseball game is in action,with pitcher at center,throwing pitch,pitcher wears glove,prepared to catch ball,other players,including batter and catcher,are positioned around field,batter stands near pitcher