If you have any interest in non-Mariner TTM autographs, Pat Neshak is the best/easiest to get. He often advertises on Twitter to send him items (as long as you include proper postage).

On the Mariners front, I can't seem to recall any current players I've had success with, but Scott Servais seems to have a good track record, and I did receive a return from former pitcher Jeff Fassero about a year ago.

I really need to get my hands on a copy of that Burke Waldron card to have signed for my collection as well; that's a beautiful looking signature.

Thanks Jason! That's funny that you mentioned Neshek as just tonight I was prepping some cards for him to sign after seeing him post on Twitter.  I sent some cards to Mariners spring training this year but I haven't sent any to those to guys.  I'll give it a shot!

You should definitely get a Burke Waldron card signed.  He was a quick return and he really seems to love doing it.  

I love that Tewksbury auto.  I haven't actually met him personally but he was a professor at my alma mater and he was very well known in the community.