The move was necessitated when catcher Yadier Molina sprained his left ankle by stepping awkwardly on first base after a ground out in yesterday's win.
Mahoney was batting .212 (14-66) with two home runs and seven RBI in 21 games at Memphis, including a 1-3, three- RBI effort that included a two-run HR yesterday at Iowa.
Mahoney will wear jersey number 46.
The term outrighted means a transaction between two teams in which a player is obtained for cash alone rather than in a trade or a trade plus cash.
Pulsipher has no record and a 6.75 ERA in five games and was removed from the Cardinals 40 man roster as well, meaning his recall to St. Louis immediately is highly unlikely.