The Cardinals selected Saggese's contract from Triple-A Memphis on Tuesday.
Brendan Donovan (foot) has been unavailable the last couple days and the Cardinals have been wanting to give Masyn Winn a little more rest, so Saggese should pick up some starts in the middle infield for St. Louis down the stretch. The 22-year-old got off to a slow start with Memphis this season but had turned it on since the beginning of July, slashing .291/.351/.524 with 12 home runs over 55 games. Saggese is starting at shortstop and batting seventh Tuesday versus the Reds in what will be his major-league debut.