1.I think we'll be able to get a leg up on the competition.

我认为我们能在比赛中占据优势。

Through his past achievements, he gets a leg up on this match.

从他之前的成就看，他这场比赛优势明显。

get a leg up:

(idiomatic) To gain some advantage; to get a head start.

2.That game really came down to the wire.

比赛到了最后关头。

I think the election will go right down to the wire.

我认为选举结果要到最后一刻才会见分晓。

down to the wire:

(idiomatic) At the very end of a process or project, especially one with a fast-approaching deadline.

3.The team went all out for a win.

团队全力以赴，想赢得胜利。

go all out:

(idiomatic) To reserve nothing; to put forth all possible effort or resources.

4.I don't know who the also-rans are. Only winners can be remembered.

我不知道失败者是谁。只有胜者才能被记住。

also-ran:

A person or animal who competed in a race but did not win.

Figuratively, a loser; one soon to be forgotten.