Bates had joined the Twins last May after having been released at the end of 2011 spring training by his original organization, the Boston Red Sox. Last season, Bates hit .316 for Rochester, third-best in the International League.
The right-handed hitter was originally drafted by the Red Sox in the third round in 2006. Bates had early success as his 28 home runs in 2007 topped all Boston minor leaguers, his 101 RBIs were third and .306 batting average sixth.
In 2008, Bates returned to Triple-A, where among his feats was a seven-RBI game. Following the season, he played briefly in the Arizona Fall League before suiting up for the first of three consecutive winters in the Puerto Rican League.
Bates reached the majors for a five-game tryout totaling 18 days in July, 2009, but that was his only taste of the bigs. Just 12 months later, he was outrighted off the Red Sox' 40-man roster.
Over 703 games in seven minor league seasons, Bates' aggregate line is .281/.378/.433. He has 77 career home runs and 357 RBI.
Bates joins four other members of the Redbirds' 25-man roster either signed as free agents or acquired in trade just since the start of this season. They are reliever Clay Zavada and outfielders Cedric Hunter, Jamie Romak and Monday's addition, Lou Montanez. Of course, this is a direct reaction to the rash of injuries in St. Louis.
To see the entire Cardinals system from top to bottom by level and position, check out the Roster Matrix at The Cardinal Nation Blog.
Brian Walton can be reached via email at email@example.com. Also catch his Cardinals commentary daily at The Cardinal Nation blog. Follow Brian on Twitter.
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