In addition, the Royals brought up right-hander reliever Greg Holland from Triple-A Omaha and sent outfielder Jarrod Dyson and right-hander Jeremy Jeffress to Omaha.
Tejeda was 0-1 with a 5.06 ERA in seven games before going on the disabled list since April 13 with inflammation of the right shoulder.
The hard-throwing Jeffress (1-1) has had control problems since he was acquired in the winter trade that sent former Cy Young Award winner Zack Greinke to Milwaukee. He walked three batters in the 11th inning on Wednesday night before Adrian Beltre hit a game-winning two-run single for Texas.
Manager Ned Yost believes Dyson is the fastest runner in the major leagues and has used him effectively as a late-inning pinch runner. Dyson was 9 for 9 in stolen base attempts before he was picked off first Wednesday night right after Eric Hosmer's solo home run tied the game 3-3.
In 21 2-3 innings with Omaha, Holland was 2-0 with two saves and had a 2.08 ERA. He had 27 strikeouts and 11 walks.