Again, the " par" here is the player's kind of normal standard, average standard of ability, so if you say its par for the course, in a metaphorical way, it means, oh well, we're used to that, that's normal.
同样,这里的“标准杆” 是球员的一种正常标准,能力的平均标准, 所以如果你说它是球场的标准杆, 以比喻的方式,意思是,哦,好吧,我们已经习惯了, 那是正常的.