The team's 40-man roster now is at 39.
Chirinos, 26, set career highs with a .326 batting average, 18 home runs and 74 RBIs combined at Tennessee and Iowa. He also hit 28 doubles, and drew 44 walks while striking out 43 times. Behind the plate, Chirinos threw out 28 of 88 potential basestealers.
A right-handed hitter, Chirinos spent most of the season with the Smokies, where he hit .318 with 24 doubles, 15 home runs and 64 RBIs in 77 games. He was sidelined May 25-June 3 because of a concussion, but rebounded to hit .310 in July.
Adduci, 25, a native of Evergreen Park, Ill., batted .248 with nine doubles, a triple, three homers and 33 RBIs in 114 games for Iowa. He did lead the team with 23 stolen bases. Adduci was acquired in September 2006 to complete an earlier deal that sent pitcher Todd Wellemeyer to the Marlins.
Carrie Muskat is a reporter for MLB.com. She writes a blog, Muskat Ramblings, and you can follow her on Twitter @CarrieMuskat. This story was not subject to the approval of Major League Baseball or its clubs.