Kerrigan Mahan (born 27 January, 1955) is an American voice actor, also known as Ryan O'Flannigan. He is the voice actor for Sean Phillips in Robotech, Jack Baker in Robotech II: The Sentinels and Mark Landry in Robotech: The Movie.
Mahan was born in Los Angeles, California. His voice ranges from young and exuberant (Lensman and "Zillion") to sneering and Lee Van Cleef-ish (Vampire Hunter D and Crying Freeman). Mahan is known for his voicework as Goldar in Mighty Morphin Power Rangers and Power Rangers Zeo, Jeb the talking dog in VR Troopers, and (the original) Magna Defender in Power Rangers Lost Galaxy he also lent his voice to Monitor Org in Power Rangers Wild Force once again bringing back the familiar voice of Goldar. His ex-wife is Joyce Kurtz, who also did voice work at Streamline Pictures and Tokyopop.
Mahan has also been involved in theater work, having directed Matty: An Evening With Christy Mathewson, a play based on the life of baseball player Christy Mathewson, who was portrayed by another voice actor, Eddie Frierson. He played the villain Clint on S.W.A.T.'s Omega One. He was also the director for two episodes of the English version of the Japanese animated TV series Grimm's Fairy Tale Classics for Saban Productions.
He is currently living in San Luis Obispo, California.