Another forum site has a picture of Josh and his tats -- right arm is RDM (father's initials: Robert Dennis Murray) and left arm is LGM (mother's initials: Lauren Goodhart Murray). There are four smaller tattoos on his right side that appear to be more initials; speculation on the other site is that they are siblings' or grandparents' initials. (I'm a TWOP transplant and don't know whether there are rules about linking to other forums, especially if they require registration; info is easily available in a search for Josh Murray tattoos, but note that TB's Josh Murray isn't the 300-pound Josh Murray on some show called "Party Down South." Also note that the site with the photo is filled with spoilers, so consider yourself warned.)This was posted tonight on his mom's Facebook page (evidently she hasn't done anything with her privacy settings to limit access to her page):
"The answer to what are Josh's tattoos on his triceps ... When Josh was drafted by the Brewers at 17 he became very homesick & had Denny's initials tattooed on one arm and mine on the other so if he crossed his arms we were always there to give him a hug. At least that's the reason he gave when I started screaming when I saw ink under his arm."
His brother, Aaron Murray, who was recently drafted by the Kansas City Chiefs, also has tattoos of his parents' and siblings' initials (scroll about a third of the way down, below the first set of asterisks).