Signing Tanaka would be 'tough thing' for Rangers

Signing Tanaka would be 'tough thing' for Rangers

Signing Tanaka would be 'tough thing' for Rangers

ARLINGTON -- The Rangers, by signing outfielder Shin-Soo Choo, have shown they are willing to pursue the top free agents on the market.

Now they have six more weeks of shopping before Spring Training starts, and Japanese pitcher Masahiro Tanaka has just emerged as the top prize on the free-agent market.

Tanaka, who was 24-0 with a 1.27 ERA in