The Cardinals selected Komatsu, 24, in the Major League phase of the Rule 5 Draft from the Nationals in December. A baseball source said the Nationals would take Komatsu back if he was offered by the Cardinals.
Komatsu was acquired by the Nationals last July in the trade that sent infielder/outfielder Jerry Hairston Jr. to the Brewers. Komatsu was Milwaukee's Minor League Player of the Year in 2010, when he hit .323 with five home runs and 63 RBIs for Class A-Advanced Brevard County. He is projected to play center field and become a leadoff hitter in the future.
Prior to the trade to Washington, Komatsu played for Double-A Huntsville, hitting .294 with six home runs, 40 RBIs and a .393 on-base percentage. After the trade, Komatsu was assigned to Double-A Harrisburg and hit .234 with a home run and eight RBIs.