Merchan, 27, owns a career Minor League average of .294 over nine professional seasons with the Minnesota Twins, Philadelphia Phillies, Seattle Mariners and Arizona Diamondbacks. He was originally signed into the Twins' system in 1999.
During the 2008 season, Merchan batted .339 with 23 doubles, five triples, four homers and 72 RBIs with Triple-A Tucson. His average ranked fourth best in the Pacific Coast League. He made 107 starts at shortstop, three at second, two at third and one in the outfield.
Valdez, 30, owns a career Major League average of .211 with 10 doubles, two triples, one home run and 20 RBIs in 111 games over parts of three seasons with the Chicago White Sox, Seattle Mariners, San Diego Padres and Los Angeles Dodgers.
In 2007, Valdez appeared in 41 games with the Dodgers and hit .216. He split the 2008 season between Korea and Japan. With the Kia Tigers in Korea, Valdez batted .218, and he hit .256 in 29 games for the Tokyo Yakult Swallows.
With the addition of Merchan and Valdez, the Indians have five non-roster players invited to Major League camp.
Carrie Muskat is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.