Guaipe was signed by the Seattle Mariners as an undrafted free agent in 2006. The Mariners added Guaipe to their 40-man roster on November 20, 2014. He made his major league debut against the New York Yankees in relief of Félix Hernández at Safeco Field on June 1, 2015, retiring all seven batters he faced and recording two strikeouts. He would be optioned back down to the Tacoma Rainiers on June 2.\n', '

The Mariners released Guaipe on August 4, 2016. He resigned on a minor league deal on August 6, 2016. He elected free agency on November 7, 2016.\n', '

On January 27, 2017, the Chicago White Sox signed Guaipe as a free agent. He was released on March 26, 2017.\n', '

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