White Sox promote infielder Marcus Semien to Triple-A

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The White Sox still don’t know exactly what they have in Marcus Semien, but they’re moving a little closer to finding out with the decision to promote him from Double-A to Triple-A on Thursday.

Semien, a 2011 sixth-round pick, busted out in the second half of last season after an uninspiring first year as a pro. This season, he had hit .290/.420/.483 with 15 homers, 20 steals in 393 at-bats at-bats in Double-A.

What’s most impressive is the evolution of his strikeout to walk ratio:

2011: 53/22 K/BB in 229 AB
2012: 97/55 K/BB in 418 AB
2013: 66/84 K/BB in 393 AB

Semien, who was projected as a utilityman at the beginning of the season, has appeared in 47 games at short, 41 games at second and 17 at third this year. The White Sox have to decide whether they want to keep rotating him or to hand him a full-time position now that he looks more like a future regular. Gordon Beckham’s impressive rebound could leave the White Sox set at second base for a while longer, and Alexei Ramirez, though a trade candidate just 24 hours ago, is signed to play shortstop through 2015.