Mark Teahen (Mark Thomas Teahen) was born on September 6, 1981 in Redlands, California. He made his Major League debut on April 4, 2005 for the Kansas City Royals. In 2005, his rookie year, he hit .246 with 7 home runs and 55 RBI. Teahen played for the Kansas City Royals for his entire 2 year career.
Selected by Oakland Athletics in the 1st round (39th pick overall) of the free-agent draft (June 4, 2002 - signed June 9, 2002).
Traded by Oakland Athletics with Mike Wood to Kansas City Royals as part of 3-team trade in which Houston Astros sent John Buck and cash to Kansas City Royals; Kansas City Royals sent Carlos Beltran to Houston Astros; and Houston Astros sent Octavio Dotel to Oakland Athletics (June 24, 2004).