The Cardinals will have to wait at least another week before getting Matt Holliday back on the field, as the organization made the decision on Saturday to move the left fielder to the 15-day disabled list. Holliday's roster spot will be filled by first baseman/outfielder Brock Peterson, who was batting .306 with a league-high 22 home runs in 93 games for Triple-A Memphis. Peterson was also added to the 40-man roster, which now has 39 players on it. Holliday had not played since suffering a right hamstring strain while running out a ground ball on July 11 vs. the Cubs. He initially hoped that a week of rest would be sufficient enough to avoid a DL-stint, and was seemingly making progress in recent days. He participated in batting practice on Thursday and Friday. He did admit on Friday, however, that his hamstring still felt tight when he tested it running. Such limitations forced the Cardinals to play one position player short on their bench.