Like Father, Like Son?

I don't regularly watch Letterman anymore (too late for me on school nights), but I happened to catch it last night. Jordan Zevon, Warren's son, was on, and did one of his father's old songs. While it wasn't an uncanny resemblence, there were certain times, with certain phrasings, that if you weren't looking at the TV screen, you could almost have sworn it was Warren himself. It was pretty cool. I wonder if the kid writes his own songs.