The Rays' All-Star left fielder will be re-evaluated Tuesday, but he definitely will not play against the Blue Jays until Wednesday at the earliest.
"I think we're going to see how it feels tomorrow and go from there," Crawford said. "I don't think we're doing any tests just yet. We'll take it day-by-day and see what happens. Hopefully it was just something that happened today."
Crawford isn't sure how long he will be out of action.
"I've never had this problem before, so whenever you go through something the first time, it always scares you a little bit and you want to be as careful as possible," Crawford said.
Crawford wasn't sure what triggered to problem.
"To be honest with you, I don't know when it really happened," Crawford said. "I just couldn't get set in the outfield.
"My back just locked up on me pretty good. I just got an achy pain in my back. I didn't feel like I could play with it."
Crawford felt like he missed a play he normally would have made in the second.
"I knew something was wrong then," said Crawford.
Ben Zobrist moved from second base to left field and Willy Aybar entered the game at second base to take Crawford's spot in the batting order.
"[I've] never had a back problem before, so I don't know what this is coming from," Crawford said. "I know I just played 10 days on turf and I'm pretty sure that had something to do with it. Still, I didn't think I'd ever have lower back problems."
Bill Chastain is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.