The Red Sox claimed righty Santo Luis off waivers from the White Sox, according to a team press release. Luis was then optioned to Double A. Jed Lowrie was placed on the 60-day DL to clear a spot for Luis.
Luis, 26, posted a 4.34 ERA, 12.7 K/9, and 3.7 BB/9 in 56 High A relief innings last year, allowing 11 home runs. He saved 14 games for Joe McEwing's Winston-Salem Dash. The Sox had claimed Luis from the Astros in '07 in the minor league phase of the Rule 5 draft.