"I feel a lot better than last night," Upton said. "I got some treatment last night and worked on some things."
Wednesday morning, Upton had an MRI taken as well.
"I had an MRI this morning and everything was good. So as far as I know, I'm available off the bench," Upton said.
D-backs manager Kirk Gibson had already left Upton out of the lineup before the results of the MRI came back and said it was possible he could play Upton in the second game.
That would be just fine with Upton.
"I don't want to be out of this lineup, especially at this time," Upton said. "It looks good, so I'm ready to play."