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.
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.