The Diamondbacks selected Will Harris off of waivers from the Oakland Athletics last month. He has appeared in 12 games as closer for the Reno Aces, earning two saves with a 4.63 ERA. He allowed 12 hits, six walks, and struck out 23.
Harris previously appeared in the major leagues in 2012 with the Colorado Rockies, compiling a 1-1 record and 8.15 ERA in 20 games. Harris, already on the 40-man roster, will wear #38.
Putz has returned to Phoenix to see another doctor there. Writer Jack Magruder says the team will turn to David Hernandez or Heath Bell to close while J.J. is out.