Alan Embree, 36, has made a team-high 38 relief appearances for the Padres this season, going 2-2 with a 4.45 ERA (15 ER/30.1 IP). The left-hander has recorded 34 strikeouts while walking eight batters in 2006.
"Alan said he felt something covering first and that it gradually got worse," Padres manager Bruce Bochy said.
Over parts of 13 Major League seasons with the Cleveland Indians (1992; 1995-96), Atlanta Braves (1997-98), Arizona Diamondbacks (1998), San Francisco Giants (1999-2001), Chicago White Sox (2001), Padres (2002; 2006), Boston Red Sox (2002-05) and New York Yankees (2005), Embree has a career record of 32-35 with eight saves and a 4.68 ERA (311 ER/597.2 IP) in 673 games (four starts).
Cla Meredith has appeared in 24 games for Portland, going 3-0 with a 1.39 ERA (5 ER/32.1 IP) and 24 strikeouts. Meredith, who earned his second save with the Beavers on June 29 vs. Tucson, has not allowed a run in 16 of his last 18 Triple-A appearances, going 3-0 with a 0.74 ERA (2 ER/24.1 IP) over that stretch.
The 23-year-old Meredith, who along with Josh Bard was acquired from Boston in exchange for Doug Mirabelli on May 1, appeared in one game for San Diego in 2006. The right-hander was recalled from Portland on May 13 and pitched 1.0 scoreless inning in the Padres 4-3 win over the Chicago Cubs that day, earning his first Major League win. He was subsequently optioned to Portland on May 17. Over parts of two Major League seasons with the Boston Red Sox (2005) and Padres (2006), Meredith has a career record of 1-0 with an 18.90 ERA (7 ER/3.1 IP) in four games, all in relief.