Top 5 of the Sports apps for iPhone are listed below:
ESPN ScoreCenter – Ideal for single sports source for games like rugby and soccer. Access 500 sports events worldwide and get overall status and game-wise details.

FanGraphics – Best for baseball lovers. Rare and interesting baseball statistics as furnished by FanGraphs.com are provided with integration to real time game.
Fantasy Monster – Most suited for viewers of fantasy league sports through Yahoo service. It is super in supporting team management functionality. You can also try the free version Fantasy Monster Lite.
NBA Game Time – Entire gamut of NBA sports activities including videos of live games and replays can be accessed with this app.
FOX Sports Mobile – For focus on American Sports this app is the right choice. This has interactive feature also in addition to all standard features to view games.Hope sports lovers had fun with these apps.