ST. LOUIS — St. Louis Cardinals infielder Khalil Greene was placed on the 15-day disabled list for the second time with social anxiety disorder on Monday.

The Cardinals purchased the contract of right-hander Clayton Mortensen, 24, from Triple-A Memphis. That move restores St. Louis’ pitching staff to 13 after one day with a dozen following the acquisition of Mark DeRosa from the Indians.
Greene is batting .200 with five home runs and 19 RBIs. His eight errors are one off the team high despite playing in only 47 games. He was activated from the DL on June 18 after missing 19 games.
Mortensen is the 14th rookie to appear with the Cardinals this season, and would be the eighth to make his major league debut.