Outfielder Mitch Haniger, one of the Giants’ top free-agent acquisitions, will be shut down for the next five to seven days after being diagnosed with a Grade 1 left oblique strain, the club announced Saturday.

Haniger was slated to start in right field against the Rockies on Friday, but he was a late scratch after experiencing tightness on his left side while taking batting practice before the game. An MRI exam subsequently revealed the strain, which will create some uncertainty about Haniger’s availability for Opening Day.