Via Tom, via vivaelbirdos.com. From The Ed Sullivan Show, Denny McLain (star Tigers pitcher) and Bob Gibson (star Cardinals pitcher) doing a bubbly, jazzy version of "The Girl from Ipanema." I really don't know what I did with my day before YouTube.
Now, at least they have more rhythm than the 1986 L.A. Dodgers -- a.k.a. the "Baseball Bunch Boogie":
I can't find footage of Jack McDowell's band Stickfigure, or else I'd post that too. Oh, but you know who rocks? The Cleveland Indians in Major League II. This clip features "Wild Thing" by Joan Jett.
And look! The Indians are also winning in the original Major League. This brings a tear to my eye.
BREAKING ADD: Ex-Card Scott Spiezio's band Sandfrog chimes in with "LITL." BREAK.