Not every rookie will leave his mark on baseball like Aaron Judge and Cody Bellinger did a year ago, but each club has a prospect or prospects who should crack its big league roster in 2018. Below are MLB Pipeline's choices for the rookies who will make the biggest impact on each team in the American League West.
Houston: J.D. Davis, 3B/1B (No. 9 on Astros' Top 30)
Davis had to repeat Double-A at the start of 2017 because of Houston's wealth of third basemen, which was eased by the offseason inclusion of Colin Moran in the Gerrit Cole trade with the Pirates.