Best tools in MLB: Top gloves and arms in 2017

Nolan Arenado has won four straight Gold Gloves at third in the National League. Dustin Bradford/Icon Sportswire

It's "best tools" week! For the third straight year, Keith Law lays out his rankings (and reasoning) for the players with the best tools in baseball. To complete this year's rankings, he evaluates the best fielders and the best arms behind the plate, in the infield and in the outfield (see last year's rankings here). See this year's hitting tools rankings here, and pitching tools rankings here.

Catcher glove