In the three-team transaction, the Padres sent left-handed pitcher Nick Greenwood to St. Louis and right-handed pitcher Corey Kluber to the Cleveland Indians, the team announced in a statement.
Ludwick,32, is hitting .281 (79-for-281) with 20 doubles, two triples, 11 home runs, 43 RBI, 24 walks and 64 strikeouts with the Cardinals in 69 games (67 starts) this season, the release said.
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Ludwick has made 63 of his 67 starts in right field for St. Louis this year. He’s batting .302 (62-for-205) with eight homers and 29 RBI vs. right-handed pitchers this season.
In 592 Major League games over parts of eight seasons with the Texas Rangers (2002-2003), Indians (2003-2005) and Cardinals (2007-2010), Ludwick has batted .272 (529-for-1942) with 118 doubles, seven triples, 98 homers, 349 RBI, 181 walks and 487 strikeouts. He’s hit .307 (111-for-361) with 24 homers and 82 RBI in 106 career games vs. National League West teams.
A 2008 National League All-Star and Silver Slugger Award winner, Ludwick finished 16th in MVP voting that year while ranking second in the NL with a .591 slugging percentage (behind Albert Pujols).
The Padres also designated outfielder Quintin Berry for assignment, the release said.
In 13 games with Double-A San Antonio this season, Berry hit .170 (8-for-57) with one RBI and eight runs scored.
The Padres said they will make a corresponding 25-man roster move when Ludwick reports to San Diego.