(CBS) The Cubs designated right-handed reliever Rafael Soriano and left-handed reliever James Russell for assignment Tuesday, opening up two more spots on their 40-man roster as they promoted four players with rosters expanding.

Chicago called up infielder Javier Baez, left-hander Tsuyoshi Wada, outfielder Quentin Berry and right-hander Trevor Cahill from Triple-A Iowa.

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Baez, 22, was tearing it up at Triple-A, hitting .324 and working on a 16-game hitting streak. He had 13 homers and 61 RBIs in 70 games. He didn’t make the Cubs’ roster out of spring training, then dealt with family tragedy and a broken finger that kept him out for weeks.

Wada, 34, went 1-1 with a 3.73 ERA in seven starts for the Cubs earlier this season. He had a 3.95 ERA at Triple-A Iowa.

Berry, 30, signed a minor league deal with the Cubs on Aug. 24 after spending the whole season with Red Sox Triple-A affiliate Pawtucket, where he batted .228 with 35 steals in 106 games.

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Cahill, 27, signed a minor league deal with the Cubs on Aug. 18 and registered five scoreless relief outings at Iowa covering 7 2.3 innings.

Russell had a 5.29 ERA in 49 appearances for Chicago this season. Soriano had a 6.35 ERA in six appearances.

The Cubs also added newly acquired outfielder Austin Jackson to the active roster and activated catcher David Ross from the family medical emergency leave list.

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The Cubs now have 40 players on their 40-man roster and 30 players on their active roster.