First baseman Justin Morneau did not play Friday after reporting a slightly stiff lower back Thursday before a game against Boston. And he’ll likely sit out Saturday’s game against Boston as a precaution.

“He’s had plenty of at-bats, he’s played in the World [Baseball Classic] games,’’ Twins manager Ron Gardenhire said. “He’s done it all this spring. I’m not going to take a chance.’’

The Twins expect Morneau to be in the lineup for Monday’s season opener against the Tigers.