Gutierrez, 29, had more medical tests on Monday after continuing to feel some affects from the blow to the head he took when Boston pitcher Franklin Morales hit him in the right ear with a throw to first base on June 29.
Manager Eric Wedge said the news was positive and Gutierrez will likely continue working out with Triple-A Tacoma when the Mariners head out on a 10-day road trip to New York, Baltimore and Anaheim starting Friday.
"We're almost out of the woods here, but he still has to ramp up on the baseball side of things," Wedge said. "We'll have to see where he is after tomorrow, since we're leaving town. There's a good chance we'll send him out -- not on a rehab -- but let him continue working out in Tacoma as we go east and hopefully transition him there. But we just have to be open-minded with the timing on all that."