The Central League's two most historic clubs had a mini arms race last week, with each hoping to have added a little more power to their attacks.

The Hanshin Tigers struck first, ending what seemed like a weeks-long courtship by finally agreeing to a one-year deal with Dominican slugger Wilin Rosario on Wednesday.

Then on Friday it was the Yomiuri Giants announcing they had reached a two-year accord with slugging outfielder Alex Guerrero, who spent 2016 with the Chunichi Dragons.