The first in the series by Rachel Reid is the book Game Changer!
 
The first book of the series tells the steamy story of Kip and Scott and follows their love story.  

Book order: 
Book 1: Game Changer
Book 2: Heated Rivalry
Book 3: Tough Guy
Book 4: Common Goal
Book 5: Role Model
Book 6: The Long Game
Book 7: Unrivaled