You can play in shortened head to head "seasons" and raise your rank. There are also varying difficulty levels of player vs CPU challenges that give rewards in either points or cards as well.
The seasons are not really like a typical football season where you know your schedule of opponents. Let's say it is an 8 game season, when you start each game you are randomly paired with another player at your similar skill level. You have a certain number of wins needed to make the playoffs. If you win the Superbowl you go up a tier in rank, and your next season should be a bit more difficult.