Kevin “Guitar” Guffy began performing at the tender age of 12, growing up in the United States where he got his start with some of the top musicians in the business such as Jim Pepper, Ben Wolf (Wynton Marseilles, Harry Connick).

【翻译】Kevin “Guitar” Guffy 年仅12岁就开始演出，他在美国长大，在那里他跟Jim Pepper, Ben Wolf (Wynton Marseilles, Harry Connick)等顶级音乐人开始了他的音乐生涯。

【简要分析】

1. began performing：谓语。意为“开始演出”。

2. at the tender age of 12：时间状语。意为“年仅12岁”（tender表示“年幼的；未成熟的”，在这里强调年龄小。）

3. growing up in the United States：现在分词短语作伴随状语。意为“在美国成长”。

4. where he got his start with some of the top musicians in the business such as Jim Pepper, Ben Wolf：定语从句，修饰the United States。

5. got his start with sb. in sth. 开始了他与某人共同做某事的生涯。