"I felt a little pain or something," Chapman said via translator Tomas Vera. "It was actually something where I tried to avoid stepping in the hole there. I kind of pushed it up a little there."
Later, it was diagnosed as a hamstring cramp.
"We will re-assess it," Price said. "I will know more later tonight and tomorrow."
Chapman threw two warmup pitches before he was permitted to continue. He only needed one pitch -- a 101-mph fastball that Ozuna fanned on for the game-ending strike three and his 24th save.
The Ozuna strikeout extended Chapman's Major League record streak of games with at least one strikeout to 46. The last two appearances, he's gotten the needed K on his final batter.
"I think about it, of course I do," Chapman said. "I don't want this to stop. I want to continue the record. I don't want this to end that quick."
Chapman didn't think the injury would limit his availability.
"Nobody is saying I can't pitch. I feel good to pitch," he said.
Chapman originally hurt the hamstring before a July 6 game at Great American Ball Park. During the All-Star Game on July 15, it flared up again as he tried to cover first base on a groundout. It hasn't affected his velocity or ability to make pitches.
Mark Sheldon is a reporter for MLB.com. Read his blog, Mark My Word, and follow him on Twitter @m_sheldon. This story was not subject to the approval of Major League Baseball or its clubs.