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11/20/10 1:50 AM EST

Twins add four players to 40-man roster

Team also signs seven Minor League free agents

MINNEAPOLIS -- The Twins added four players to their 40-man roster on Friday, including former first-round pick Chris Parmelee.

In addition to Parmelee, the Twins added right-hander David Bromberg and outfielders Joe Benson and Rene Tosoni. Friday was the deadline for clubs to protect their prospects from being exposed to other clubs in the Dec. 9 Rule 5 Draft.

Parmelee was the Twins' first-round pick in the 2006 Draft and Benson was their second-round pick that year, but the 22-year-olds have gone through some growing pains in their Minor League careers. Last year, the two started the season at Double-A New Britain but were demoted to Class A Fort Myers in May.

The Twins organization felt the move would help both hitters grow -- and it seemed to work. The two players got hot offensively after being sent to Fort Myers and soon returned to New Britain. Parmelee and Benson were then selected as two of the seven Twins prospects to take part in the Arizona Fall League this year.

Benson earned the Twins' Minor League Player of the Year award after putting up some big offensive numbers in his combined stints between Fort Myers and New Britain. He hit 27 home runs, most of any player in the Twins organization, to go with 31 doubles, eight triples and 62 RBIs.

Parmelee batted .285 with eight homers and 61 RBIs between the two levels in '10, and things continued to improve in his second stint in the Arizona Fall League. He hit .339 with 11 doubles, two triples and a .405 on-base percentage in 29 games for the Peoria Saguaros.

Bromberg began the season with Double-A New Britain before a midseason promotion to Triple-A Rochester. Between New Britain and Rochester, the 23-year-old compiled a 6-9 record to go with a 3.75 ERA.

Tosoni's season ended prematurely after he suffered a torn labrum in his right shoulder in June and underwent surgery. Prior to his injury, the 24-year-old was batting .270 with eight doubles, four homers and 24 RBIs for New Britain.

The moves gave the Twins a total of 38 players on their 40-man roster.

In addition, the Twins also announced they had signed seven players to Minor League free-agents deals, with invitations to Spring Training. Two of them, right-hander Kyle Waldrop and backstop Jair Fernandez, were previously in the organization and were re-signed after becoming six-year free agents. Five other players, left-hander Phil Dumatrait, right-hander Yorman Bazardo, and infielders Jeff Bailey, Justin Huber and Chase Lambin, were also signed and invited to camp.

Kelly Thesier is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.