Need Help With a Signature!

Hi everyone! I was looking through some old belongings with my family and we came across this signed baseball card of the 2006 team. We believe the signature on the left is from Nate Robertson based on the 29, but we're having trouble with the one on the right. I've tried matching the signature to a team photo but haven't had much luck yet. If anyone knows and could help us out I'd appreciate it, thank you!