Kirby Kali Yates (born March 25, 1987) is an American professional baseball pitcher for the Los Angeles Dodgers of Major League Baseball (MLB). He has previously played in MLB for the Tampa Bay Rays, Los Angeles Angels, New York Yankees, San Diego Padres, Atlanta Braves, and Texas Rangers.

Yates made his MLB debut in 2014, and was an All-Star in 2019, when he led the National League in saves. He made the All-Star team again in 2024.

Yates was drafted by the Boston Red Sox in the 26th round of the 2005 Major League Baseball draft out of Kauai High School in Lihue, Hawaii. He did not sign and attended Yavapai College. He missed both the 2006 and 2007 seasons due to Tommy John surgery.

After going undrafted in the 2009 MLB draft, Yates signed with the Tampa Bay Rays as an amateur free agent on June 22, 2009, and began his professional career with the Princeton Rays of the Appalachian League. In 2010, he spent most of the season with the Bowling Green Hot Rods of the Midwest League, where he was 3–6 record with a 3.30 ERA in 27 games (12 starts). He was promoted to the Charlotte Stone Crabs of the Florida State League on August 12, but made only one start before he was shut down for the year with a strained right shoulder that required offseason surgery. The surgery caused him to also miss the first two months of the 2011 season before rehabbing in the Gulf Coast League and then rejoining Charlotte on June 22. Yates made 16 appearances with them, allowing only six runs in 33+1⁄3 innings over 16 appearances and played with the Surprise Saguaros in the Arizona Fall League after the regular season ended.

In 2012, Yates reached the Double-A level with the Montgomery Biscuits, where he had a 2.65 ERA and 94 strikeouts in 68 innings over 50 games. His 12.44 strikeouts per nine innings led all Southern League pitchers and he again returned to the Arizona Fall League, this time with the Phoenix Desert Dogs. Yates was a Triple-A All-Star in 2013, putting up a 1.90 ERA in 51 games for the Durham Bulls. He was also selected as the Rays organizations Minor League Relief Pitcher of the Year while recording 16 saves.

Yates was added to the Rays 40-man roster on November 20, 2013 and made 21 appearances for Durham, allowing only one run in 25 innings. Yates was called up to the majors for the first time on June 7, 2014, and made his debut that day, pitching 1+1⁄3 scoreless innings against the Seattle Mariners with two strikeouts (his first being against Brad Miller). In 37 games, he posted an ERA of 3.75 in 36 innings, striking out 42. The following season he struggled, posting an ERA of 7.97 in 20+1⁄3 innings for the Major League club and 5.68 in 25+1⁄3 innings for Durham as he shuttled back and forth between the majors and minors.

The Rays designated Yates for assignment after the 2015 season.

On November 25, 2015, the Rays traded Yates to the Cleveland Indians for cash considerations. He was subsequently designated for assignment on January 5, 2016, and three days later traded to the New York Yankees in exchange for cash considerations. Yates made the Yankees' Opening Day roster in 2016 and pitched in relief for the Yankees for most of the season, although he was optioned to Triple-A Scranton/Wilkes-Barre on June 28, and then recalled on August 17. In 41 games for the Yankees, he posted an ERA of 5.23 and 50 strikeouts in 41+1⁄3 innings.