The Indians claimed Wood on waivers, anticipating his rebound from Tommy John surgery, which kept him out the entire 2012 season.
Two other pitchers coming off elbow reconstruction surgery, starters Felipe Paulino and Danny Duffy, were taken off the 60-day disabled list and reinstated to the roster.
The Royals made two waiver claims, obtaining right-handed pitcher Guillermo Moscoso from Colorado and catcher Brett Hayes from Miami.
Catcher Manny Pina was optioned to Triple-A Omaha and three players were designated for assignment -- relief pitchers Jeremy Jeffress and Tommy Hottovy and outfielder Jason Bourgeois.
With pitchers Joakim Soria and Jeremy Guthrie becoming free agents, the Royals' roster stands at 40 players, including recently acquired pitchers Ervin Santana and Chris Volstad. The Royals have indicated interest in re-signing both Soria and Guthrie.
Moscoso, who'll turn 29 on Nov. 14, has pitched for Texas, Oakland and Colorado. Last season for the Rockies, he worked 23 games, including three starts, and was 3-2 with a 6.12 ERA. His best season was as a rookie with the A's in 2011 when he went 8-10 with a 3.38 ERA in 23 games, all but two as a starter.
From Maracay, Venezuela, Moscoso signed with Detroit in 2003 and threw a nine-inning perfect game in 2007 for Oneonta in the New York-Penn League.
Hayes, 28, has been a backup catcher for the Marlins for part of the last four seasons. Known for his defensive work, the right-handed batter had a .202 mark in 39 games last season. In his career, Hayes has hit .217 in 143 games and has thrown out 19 of 74 (26 percent) attempted basestealers.
From Notre Dame High School in Sherman Oaks, Calif., Hayes went to the University of Nevada and was drafted by the Marlins in his second round of the 2005 First-Year Player Draft. His father, Tim Hayes, was drafted by the Royals in the fourth round in 1975 but did not play professionally.
Wood, a right-hander, pitched for the Royals in 2010 and 2011, compiling a 6-6 record, one save and a 4.30 ERA in 106 relief appearances.
Jeffress, who arrived from Milwaukee in the Zack Greinke trade, had 13 relief outings with no record and a 6.75 ERA this season. A hard-throwing right-hander, command issues have been a problem and he spent most of the season with Triple-A Omaha.
Hottovy, a Kansas Citian, is a left-handed situational sidearmer who had a 2.89 ERA in nine relief appearances. He also had a 2.52 ERA in 41 games this year for Omaha.
Bourgeois, a right-handed batter obtained from Houston during Spring Training, was used primarily against left-handed pitchers. He hit .265 against lefties and .258 overall.
Pina underwent knee surgery during Spring Training and when he recovered, he spent most of his time with Double-A Northwest Arkansas, where he hit .263 in 43 games. He was called up by the Royals in September but played in just one game.
Dick Kaegel is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.