When it restructured the minor leagues, Major League Baseball created West Coast leagues at Triple-A, High-A and Low-A by porting over what were the Pacific Coast, Northwest and California leagues.
However, no West Coast minor league exists at Double-A to serve West Division major league organizations. The closest any Double-A affiliate comes to the Pacific Ocean is Amarillo, Texas, which is two time zones away.
As a result, many West Division clubs face grueling travel both to and from Double-A affiliates. No team will rack up more frequent flier miles than the Giants, whose prospects trek from High-A Eugene to Double-A Richmond and back to Triple-A Sacramento. The total distance to drive between those affiliates is 5,656 miles.
The Rockies (4,790), Mariners (4,547) and Angels (4,081) also have High-A, Double-A…