In football, you wear a helmet. In baseball you wear a cap!

打橄榄球，你得戴上一顶头盔，而打棒球，你只需戴一顶帽子就行了。

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"What? This? This is my lucky helmet," I said, tucking strands of hair beneath the cap.

“怎么？这个吗？这是我的幸运头盔，”我说，把一缕头发压在帽子下面。

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Modem materials enable the designers to construct a lightweight helmet, far from the days of leather cap with straps 0f the 1930's.

现代材料使得设计者可以造出轻巧的头盔，这和30年代用吊带固定的皮帽相去甚远。

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He'd engineered five fourth-quarter comebacks this year already and so, with 3:34 left and the Giants down 35-27, he coolly swapped his red baseball cap for his helmet and marched the Giants down filed.

WSJ: Giants Take Perfect Packers to Brink, Fall Short

One of the companies making headway in the Business of Concussions is Guardian Caps, which created a cap that an individual can place on an existing helmet for the stated purpose of reducing the impact in the case of a blow to the head.

FORBES: The NFL And The Booming Business Of Concussions

Hayden removed his protective helmet towards the end of his mammoth innings, preferring to don his beloved baggy green cap.

BBC: SPORT | Cricket | Lara lauds Hayden