Since your dad is tall and you are only 15 I think there is a good chance you will gain height. I would advise you to stay away from hormone supplements and other miracle medicines which help gain height as they do more harm than good. Eat a well balanced diet and exercise regularly and remember a healthy body is a blessing no matter how tall.
Its good to know you are concerned about yourself as well as sports. However, your height is not the only criteria for doing good in sports.
However, a rough idea can be brought by the height of the parents and usually the height is close to the average of the parents height. Further, height is determined by internal factors such as hormonal status and age of menarche in girls.
In either case it is difficult that you will grow taller by 5" within this summer season.
You may find more information at : http://en.wikipedia.org/wiki/Human_height
Please let me know if you need any more information.