Rotowire: Jan 31 / 8:06a ET
News: Castellanos will make a trip to Texas to work with Tigers defensive coordinator Matt Martin prior to the start of spring training, the Detroit News reports.
Impact: The primary emphasis for Castellanos will be improving his first step, as his defense graded out poorly with the move back to third base for the Tigers in 2014. He has the physical tools, including the arm strength, to become an adequate defender at the position. His second full season in Detroit will likely put him in the bottom third of the order, although the Tigers are seeking an option to replace Torii Hunter in the No. 2 hole since offseason acquisition Yoenis Cespedes doesn't carry an ideal profile for the role.