I sent two cards to the Texas Rangers campus on February 27th.
They were returned today.
(Sent 2/27/15 returned 3/23/15 total = 24 days)
I was very happy to open the envelope and find not one, but two Adrian Beltre autographed cards. He has a unique signature and I'm happy to have these two in my growing (3 now...) collection of TTM cards.