The smile Ken Griffey Jr. was famous for flashing during his playing days appears to have gone MIA.

Griffey appeared on 'SportsCenter' on Wednesday to help promote Upper Deck's 25th anniversary in a spot sure to warm the hearts of fans who own his iconic 1989 rookie card.

Veteran ESPN anchor Linda Cohn had the honors of doing the Q&A, which quickly devolved into an awkward conversation you might actually see on 'Curb Your Enthusiasm.'

For his part, Griffey quickly apologized for his behavior.