Darvish in 2019 for the Cubs was 6–8 with a 3.98 ERA and 225 strikeouts in 31 starts. He gave up 33 home runs, the most in the National League, threw 11 wild pitches, the second-most in the NL, and hit 11 batsmen, third-most in the league.
Darvish is a right-handed pitcher who throws from a three-quarter arm slot in a drop-and-drive motion. He has a large frame for a pitcher, listed at 6 ft 5 in and 220 lb. Darvish throws a four-seam fastball which averages 93–95 mph (tops out at 99 mph), as well as a hard slurve (slider) in the low 80s with a sharp break. He complements these two with a wide repertoire of secondary pitches, including a two-seam fastball (also described as a shuuto), a cutter, two curveballs, a splitter, and an occasional changeup. Darvish has a "fast curve" and a "slow curve", the former averaging about 80 mph and the latter about 71. The slow curve is almost exclusively used in no-strike and 1-strike counts, while the fast curve is mostly used in 2-strike counts. Some professional scouts consider Darvish to have the best repertoire of quality pitches, including the best slider, in all of Major League Baseball. In August 2019, Darvish learned a knuckle curve from Cubs teammate Craig Kimbrel and began using the pitch.
In 2019 season alone, he used 10 different pitches: Cutter with two different movements, four seam and two seam fastballs, slider, splitter, normal and slow curveballs, knuckle curve and a changeup. In 2020, he revealed on Twitter that he learnt a 'supreme pitch', which is a hybrid between a splitter and two-seam fastball. This pitch can reach 93 mph.
Darvish resides in a $4.55 million home in Evanston, Illinois. Darvish has caused controversy in his neighborhood with requests to construct a six-foot high fence around the property and to acquire adjacent land owned by the City of Evanston. The six-foot fence would require a zoning variance and would obstruct the lake views of neighbors. Darvish built a 6-foot solid wood fence, and Darvish's neighbors filed a lawsuit in Cook County Circuit Court on March 29, 2019, asking a judge to rule that the Darvishes' fence obstructed their view of Lake Michigan, violating an easement and a verbal agreement.