San Francisco has already added Jeff Samardzija on a five-year agreement, adding him to a rotation that includes Madison Bumgarner, Matt Cain, and Jake Peavy.
The 29-year-old spent last season with both the Cincinnati Reds and Kansas City Royals, but struggled in the regular season with a 4-7 record and a 4.76 ERA in just 13 starts. He appeared in the World Series for the first time in his career, winning it all with the young Royals.
The one-time All-Star has a career record of 96-70 with a 3.30 ERA in eight seasons in the majors. Since 2010, he owns a 2.87 ERA, which is good for third among starters behind Clayton Kershaw and Adam Wainwright. His 455.2 innings pitched over the last two seasons ranks behind only David Price and Corey Kluber for tops in the league.
The right-hander is in the top five in ERA, opponent OPS and WHIP over the past five years. He reportedly turned down a $120 million offer from the Arizona Diamondbacks in November, which led them to sign Zack Greinke.
Many experts had the Dodgers and Cardinals in the running before Cueto decided to head toward the bay.
The Giants will look to focus on offense for the rest of the winter, including outfield help from the likes of Justin Upton, Yoenis Cespedes, or Alex Gordon. On the other side of the ball, as long as the rotation remains healthy, San Francisco will look to smother teams with their barrage of aces.