【今週のクイズ】MLBの「1406」ってなんの数字?
April 11, 2019 - Las Vegas, Nevada, U.S. - Retired Major League baseball player and now special coach Rickey Henderson works with the Las Vegas Aviators during practice before the team plays the Sacramento River Cats at the Las Vegas Ballpark on April 11, 2019, in Las Vegas, Nevada. (Credit Image: © David Becker/ZUMA Wire)、クレジット:©David Becker/ZUMA Wire/共同通信イメージズ