Twins' Luis Arraez emerging as one of 2019's top MLB rookies

Major League Baseball rookie leaders in on-base percentage:

Yordan Alvarez, Houston.417

Luis Arraez, Twins.408

Bryan Reynolds, Pittsburgh.397

Fernando Tatis Jr., San Diego.379

Keston Hiura, Milwaukee.376

Pete Alonso, N.Y. Mets.372

Garrett Cooper, Miami.353

Vladimir Guerrero, Toronto.352

Christian Walker, Arizona.343