Pop star Nick Jonas was left nursing more than a bruised ego during a charity baseball match on Saturday (29Jun13) after he was knocked to the ground by a rival player.

The Jonas Brothers drummer was taking part in the Dirk Nowitzki Celebrity Baseball Game at the Dr Pepper Ballpark in Frisco, Texas to raise funds for good causes.

Jonas faced tough competition from professional and amateur athletes, and was knocked to the ground in a collision on the field.

After the game, Jonas took to Twitter.com to write, "Had such a great time playing today... And a great cause too. Had a little injury at the end of the game, but I'm all good not a big deal!"

The event was held to raise money for the Dirk Nowitzki Foundation, a children's charity, and the Heroes Foundation, which helps cancer-sufferers.