"Jake's throwing the ball well down in Triple-A," Porter said. "We want to give him an opportunity to see if he can fill that role."
Buchanan was credited a loss to the Rays in his big league debut on June 21, allowing ive runs and eight hits over 4 1/3 innings. He earned his first win in his only other appearance -- a hitless 11th inning against the Tigers six days later.
Daniel Kramer is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.