Hultzen (shoulder) was outrighted to Triple-A Tacoma on Wednesday, the Seattle Times reports.
The No. 2 overall pick in the 2011 draft, he is out of options and coming of a 2015 season plagued by shoulder issues, so it's not much of a surprise that the lefty went unclaimed on waivers. Hultzen will remain in the Mariners' organization at least through 2017, after which he can become a minor league free agent if he's not on the 40-man roster.