An Internet video suggests that Twins catcher Joe Mauer was stealing signs from second base in Tuesday's game against the Tigers. The 4?-minute amateur video, posted on YouTube, shows Mauer fiddling with his helmet and touching his face during a Jason Kubel at-bat in the sixth inning of Detroit's 6-5 victory. "I started laughing and said, 'This is a joke.' And then I said, 'Here we go,' " Minnesota first baseman Justin Morneau said. "It's pretty funny. There don't have to be facts behind anything anymore. You just throw stuff out there, and they want us to prove it wrong. "I've hit behind Joe for five years and I've never gotten a sign from him yet. I'm still waiting."