Getting the honors are third baseman Kris Bryant (NL Rookie of the Year), starting pitcher Jake Arrieta (NL Cy Young) and manager Joe Maddon (NL Manager of the Year).
The 23-year-old Bryant was unsurprisingly a unanimous selection, after finishing the season with 25 home runs, 99 RBI, 87 runs, 13 stolen bases, a .275 batting average, a .369 on-base percentage and a .488 slugging percentage.
Maddon, who was previously selected as the AL Manager of the Year in 2008 with the Tampa Bay Rays, took 18 of the 30 first-place votes in this year's NL race, with St. Louis Cardinals manager Mike Matheny (nine) and New York Mets manager Terry Collins (three) getting the others, per the Chicago Tribune.
Arrieta was expected to be in a somewhat tighter race, but he also won his award with relative ease, getting 17 of the 30 first-place votes, ahead of Los Angeles Dodgers pitchers Zack Greinke (10) and Clayton Kershaw (three), according to the Denver Post.
Back in 2001, the 116-win Mariners also took home three major awards, with outfielder Ichiro Suzuki earning both AL MVP and Rookie of the Year honors, and Lou Pinella being named AL Manager of the Year.
Both teams lost in the LCS, with the Mariners lasting just five games and the Cubs getting swept.