Of course, I wasn't satisfied with just one card, so I sent the 2009 Topps Update base and a 2007 Bowman Chrome. Both of these cards look nice, too.
Walters (b. 1985) played in the majors from 2009 to 2013 for the Cardinals and Twins. He had a career record of 6-10 with 104 strike outs and a 6.28 ERA.
I mailed to Walters on April 22 and got the cards back on July 6, for a 75-day TAT.