"I was hanging out on the couch watching the Giants-Phillies game," Stange said.
A phone call from his manager changed that, as Stange found out he was headed to the big leagues for the first time to take the place of injured reliever Leo Rosales.
"Stange was available, on the 40-man [roster] and pitching well, so he earned the opportunity to fill in for Rosales," D-backs manager A.J. Hinch said.
In eight relief appearances for Reno, he was 3-1 with a 2.89 ERA.
A seventh-round pick in the 2006 First-Year Player Draft, Stange was rising through the organization before having Tommy John surgery in October 2007, which caused him to miss half of 2008.
"Stange is a good development story," Hinch said. "He's had to get back on track and he's doing that. He brings a lot of intensity, he's got a good focus. He really is competitive on the mound and he's got good stuff."
Stange, who throws a fastball, slider and occasional changeup, has benefitted from a change in mechanics made during Spring Training.
Stange didn't have to wait long to get his first taste of the Majors, as he was called on to work the ninth inning on Thursday with the D-backs holding a 13-5 lead.
"It was obviously exciting," said Stange, who retired the Cubs in order. "Little bit [of nerves]. Obviously, now it's all done and over with, and now it's just basically back to baseball, so that's good."