The 1941 Anaheim Aces! They competed for only one season in the California League before folding as a consequence of America's entry into World War II. On their roster, they boasted one former major-leaguer (Lloyd Brown, then 36 years of age) and one future major-leaguer (Bert Shepard, who would appear in exactly one game for the 1945 Washington Senators).

Mostly, though, they had some fine-looking lids ... 

That image comes via IdealCapCo.com, where this hat and many other fetching baseball fashion items are available for purchase. It's a fine hat, I'm sure you'll agree. The ace of hearts is on it! That evokes pleasing thoughts about games of chance and wholesome, nutritious gambling! 

Oh, and speaking of the aforementioned Anaheim Ace Bert Shepard? He made that lone big-league pitching appearance while wearing an artificial leg -- the result of his service in the Eurpoean Theater of World War II. An Ace indeed.