The Pirates optioned Peguero to Triple-A Indianapolis on Friday.
Peguero entered spring camp as the Pirates' likely Opening Day second baseman, but he will instead head to the minors after going 7-for-26 with three RBI. With the 23-year-old in Triple-A, Jared Triolo figures to take over at second base, but Peguero could reclaim his spot if he gets off to a fast start in Indianapolis.