The Cardinals are expected to activate Ryan Ludwick today before their Friday game in San Francisco against the Giants.
To make room the team will have to release, disable or option to the minors another player on the roster. The likely candidates are:
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-- Pitcher Blaine Boyer who has struggled since being acquired from the Braves in trade for Brian Barton. It's hard to justify carrying an extra pitcher when he has a 6.23 ERA in 8 2/3 innings.
-- Outfielder Nick Stavinoha, who is hitting only .250 since being called up to replace Ludwick in the outfield. On Stavinoha's side, his hits have been huge, driving in key runs in three of the Cardinals last four wins. He played a part in all three of the Birds three runs Wednesday in a 3-2 win over Milwaukee
-- Shortstop Khalil Greene may be the most likely of the candidates. He has been virtually unusable in the month of May because of an anxiety-related issue that the Cardinals think merits a trip to the disabled list. It is unlikely the Birds would cut Greene, who is making $6.5 million this year. But his problem has proven significant enough that it wouldn't be a surprise to see him never play another game for St. Louis.