Even at 73 and with two artificial hips, knee problems and a bad back, grandmother Pat Keller is still a knockout. And she's got the gold medal to prove it.

The Brooklyn Park woman was the first champion crowned in the first-ever Wii Olympics at the Annapolis Senior Activity Center last week. Ms. Keller bested 74-year-old Edward Calhoun of Annapolis in a virtual boxing match - even though he'd competed in the sport for real as a young man.

"He was very good," a smiling Ms. Keller said after the takedown. "I thought he'd whip my butt, to tell you the truth. But I've got a lot of stamina."

Ms. Keller's all-out,...