Roki Sasaki flashes big fastball, wicked splitter and a few nerves in first bullpen with the Dodgers
Sasaki agreed last month to a minor league contract with a $6.5 million signing bonus as an international amateur free agent under Major League Baseball's rule.
Hernández: What is the ceiling for rookie Roki Sasaki? 'Inside, I'm really nervous'
Roki Sasaki has the talent to be an instant sensation the way Fernando Valenzuela or Hideo Nomo were in previous generations.