Nittoli signed a minor-league deal with the Twins on Friday, Do-Hyoung Park of MLB.com reports.
Nittoli was let go by the Mariners on Thursday, and it didn't take long for him to find a new team. He posted a 5.61 ERA, 1.30 WHIP and 41:7 K:BB over 33.2 innings for Triple-A Tacoma before being released, and he'll now report to Triple-A St. Paul for the Twins.