In 2005, Tejeda made the jump to the major league club. Starting with his debut against the Milwaukee Brewers on May 10, 2005, he appeared in 26 games – half of those as a starter.
Just prior to the start of the 2006 season, Tejeda was dealt by the Phillies to the Texas Rangers along with Jake Blalock (the brother of free agentthird basemanHank Blalock) in exchange for outfielderDavid Dellucci. He started the season with the Triple-A Oklahoma RedHawks, but was called up to the Rangers at the end of April. His first outings were shaky, and he was quickly reassigned back to Oklahoma. Aside from an emergency call-up in June, Tejeda stayed with the RedHawks until he was recalled for good in mid-August. Tejeda was in excellent form for the latter third of the season, going 4-1 over eight starts, with an ERA of 2.01.
Tejeda earned a spot in the starting rotation for the 2007 season, but poor performance in July resulted in his demotion back to Triple-A.
Kansas City Royals
On June 24, 2008, the Kansas City Royals claimed Tejeda off waivers from the Rangers.
Tejeda throws a quality fastball (96 mph) and changeup, and is developing a useful curveball.
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In spring training in 2009, Tejeda led all players in walks, with 17 (in 17.1 innings).
On May 26, 2011, Tejeda was designated for assignment by the Royals.[2] He cleared waivers and was sent outright to Triple-A Omaha Storm Chasers on June 2. He elected free agency after the season on October 7.
Cleveland Indians
On January 3, 2012, Tejeda signed a minor league contract with the Cleveland Indians. He also received an invitation to spring training. Tejeda was released by the Indians' organization on May 16, 2012.[3]
Rojos del Águila de Veracruz
On July 6, 2013, Tejeda signed with the Rojos del Águila de Veracruz of the Mexican League.[4] He was released on August 8. He made 5 starts throwing 27.2 innings going 1-0 with a 5.86 ERA and 19 strikeouts.