August 7 vs Yomiuri at Tokyo Dome – Rosario blasted the first grand slam of his career (first inning, Tetsuya Utsumi).
Rosario wanted to make a good impression and was eight minutes late to his introductory press conference on January 28, 2018 because he wanted to wear a suit. He wore a grey suit with a light-blue tie.
Source: Daily Sports 1/28/2018
April 18 vs Chunichi at Nagoya Dome – Rosario recorded the first modasho of his NPB career.
Source: Daily Sports 4/18/2018
May 8 vs Hanshin at Tokyo Dome – Rosario hit the JR billboard in left-center during his at bat in the third inning. He will get a one million yen View card for his accomplishment.
The Hanshin Tigers announced on July 19, 2018 that Rosario decided to donate one million yen to rain disaster relief efforts in Western Japan.
Rosario asked the Hanshin Tigers to prepare a catcher’s mitt for him during contract negotiations in December 2017. The Tigers are planning to use Rosario at first, but having the option to use him at catcher would give them more roster flexibility. Rosario seems fully prepared to play where ever the team needs him. Source: Daily Sports 12/30/2017