In preparation for his April 24 fight against Chris Arreola, (28-1, 25 KOs ). Tomasz Adamek, (40-1, 27 KO’s), is in Houston, training with Ronnie Shields. Shields, no stranger to making cruiserweights into heavyweight champions, was a key part of the training staff that guided Evander Holyfield to his heavyweight titles. Shields had this to…