The Cardinals tonight traded righthanded reliever Mitchell Boggs, who had been at Class AAA Memphis, to the Colorado Rockies for their fourth slot in the international signing bonus pool, which is No. 93 overall. Worth $206,400, the Cardinals would have until next July 2 to spend that money for a prospect or prospects in the Dominican Rebublic or Venezuela. Boggs, one of the top setup men in baseball last year, never really got off the ground when he had to take over as the closer this season after Jason Motte went out with elbow surgery. Boggs, 29, was 0-3 with two saves and an 11.05 earned run average with the Cardinals and was 0-2, 5.70, at Memphis, where he had been sent twice this season. This spring, Boggs was gone for much of Cardinals camp as he participated for Team USA in the World Baseball Classic. When he returned, he suddenly was the Cardinals’ closer but didn’t seem to adjust to it. “He just never got on track,” said general manager John Mozeliak. “I do think he had a comfort level where he was last year and he was obviously very successful at it. Something affected him, because he wasn’t the same pitcher.” There had been some other interest in Boggs, Mozeliak said, but “the market seemed like it was starting to fade, so I felt we had to do something.”