"It kind of feels like [Opening Day]," Hill said. "It's fun. It's just been a long time. Unfortunately, it was longer than anyone expected it to be."
Hill's injury was a non-union fracture, which means the bone has not and will not completely heal, so further rest will not help the situation.
As long as Hill is pain-free or can tolerate it if there is any pain, he can play.
"We took the time that the doctors told us to take," Hill said. "It feels great now, a lot of hand-strengthening exercises and a lot of things we've been doing the last few weeks."
Hill played in six rehab games for Triple-A Reno and said the biggest tests for the hand came from check swings and swings and misses. Once he cleared those hurdles without any pain, it was just a matter of getting his timing down at the plate.
"The last few days felt great, and I told them I'm ready to go," Hill said.
If Hill makes it through the rest of the season without re-fracturing the hand, he can choose whether to have surgery on the hand during the offseason to correct the non-union fracture.
"It'll be a personal choice," Hill said. "It's up to me at the end of year, how it feels and just kind of play it by ear."
The D-backs optioned left-hander Joe Paterson to Reno to make room on the roster for Hill. The D-backs had been carrying an extra pitcher on the roster.
Steve Gilbert is a reporter for MLB.com. Read his blog, Inside the D-backs, and follow him on Twitter @SteveGilbertMLB. This story was not subject to the approval of Major League Baseball or its clubs.