Baseball is said that it is in crisis over its lack of appeal to younger generations.

英訳に間違いが有れば正してください。

野球は若い世代へ訴えかける魅力の欠如により危機に瀕していると言われてる。
Baseball is said that it is in crisis over its lack of appeal to younger generations.

答え
Baseball is said to be in crisis over its lack of appeal to younger generations.
もしくは
It is said that baseball is in…
とする

XはYと言われているを表す場合
X is said to be Y
It is said that X is Y

X is said that X is Yは不可