"I don't know," said Crisp, when asked if he feels he'll be ready for Monday's opener with the Rangers.
Later, manager Bob Melvin confirmed, "He had some issues. A couple swings bothered him, so we'll sit down in the morning [on Wednesday] and see what the plan is."
The A's have been patient with Crisp, knowing he doesn't need as many at-bats as the typical player to be Opening-Day ready, but he has just 15 at-bats in Cactus League games and would seemingly have to accumulate several plate appearances in this weekend's Bay Bridge Series to avoid the disabled list.
Should Crisp join Josh Reddick (right oblique) on the DL, the A's would likely add hot-hitting outfielder Billy Burns to the Opening Day mix.
Jane Lee is a reporter for MLB.com. Read her blog, Major Lee-ague, and follow her on Twitter @JaneMLB. This story was not subject to the approval of Major League Baseball or its clubs.