"If we send him to Milwaukee ... we sent him to Milwaukee to see Dr. Raasch," Counsell said.
Gennett felt the oblique tightness in the batting cages Tuesday and was scratched about 30 minutes before first pitch. He is hitting .258 with four home runs and a .361 on-base percentage.
Right-hander Corey Knebel is on the 15-day disabled list with a left oblique strain, and right-hander Matt Garza is also on the DL with a right lat strain, a somewhat similar injury.
"It seems to be a more common injury in baseball the last couple of years, but I don't have any explanation for it," Counsell said.
Counsell and the Brewers learned last year how careful teams must be when players are coming back from these type of injuries. Right-handed starter Wily Peralta went on the DL with a left oblique strain last May, but the injury lingered and led to him being shut down in September.
"You've got to be cautious, for sure," Counsell said. "It's involved in every movement you make in baseball."
Cody Stavenhagen is a reporter for MLB.com based in Chicago. This story was not subject to the approval of Major League Baseball or its clubs.