Wizards guard Gilbert Arenas has warned some of his young teammates that they need to get serious this offseason in preparation for the 2009-10 season.

"We've just been a goofball team for a while. It's fun when you're winning. But when you're not winning, it's depressing a little bit," Arenas said. "To be honest, I'm a goofball. But when I step inside those lines, it's serious. Some of them don't know how to turn that on and off. I told them, it comes with time. You've got to put your work in in the summer because we're coming at you."

Washington was 19-63 this season, while Arenas missed a majority of the season with chronic knee issues.

"He said next year's going to be totally different, no playing around," Andray Blatche said. "Gil surprised me with it."