Mitchell was drafted by the Denver Nuggets with the 13th overall pick in the 2017 NBA draft only to be traded to the Utah Jazz for the 24th pick (Tyler Lydon) and Trey Lyles. On July 5, 2017, Mitchell signed a four-year rookie scale contract with the Jazz. On July 11, 2017, Mitchell signed a multi-year shoe deal with Adidas. Later that day, Mitchell scored 37 points against the Memphis Grizzlies in the 2017 NBA Summer League in Las Vegas, the most by any player during the 2017 NBA Summer League. In his NBA debut on October 18, 2017, Mitchell registered 10 points and 4 assists against the Denver Nuggets. On December 1, 2017, he scored a career-high 41 points in a 114–108 win over the New Orleans Pelicans. He set the Jazz scoring record for a rookie and became the first NBA rookie to score 40 points in a game since Blake Griffin in 2011. He surpassed Darrell Griffith's team-record 38 in 1981. Mitchell also became the seventh rookie in franchise history to have a 30-plus point game, as well as the first to have a 40-plus point game. On January 4, 2018, Mitchell was named the Western Conference Rookie of the Month for December 2017 after averaging 23.1 points, 3.4 assists, 3.2 rebounds and 1.8 steals in 34.3 minutes per game during the month of December. On January 15, 2018, Mitchell surpassed Karl Malone for most 20+ points games during a rookie season when he had his 19th 20+ point game. On February 2, 2018 Donovan recorded his second 40 point game of his rookie season against the Phoenix Suns, becoming the first rookie guard to notch two 40-point games since Allen Iverson in 1996-97. On February 5, 2018, Donovan was named by the NBA as an injury replacement for Orlando Magic forward Aaron Gordon (strained left hip flexor) for the 2018 NBA Slam Dunk Contest. He won the contest scoring a 48 and 50 in the first round, then a 50 and 48 in the final round being the first rookie to win the contest since Zach LaVine. On March 1, 2018, Mitchell was named as the Western Conference rookie of the month for the third time that season for games played in February. On April 10, he set a rookie record for most three-pointers in a season with 186 three-pointers during a 119–79 win over the Golden State Warriors. On April 12, at the end of the regular season, Mitchell was named Western Conference Rookie of the Month for March and April.In Mitchell's playoff debut against the Oklahoma City Thunder on April 15, he recorded 27 points, 10 rebounds, and 3 assists. he bruised his foot during the game and was questionable for Game 2, but was able to play, scoring 28 points, including 13 in the fourth quarter to lead the Jazz to a 102–95 win. Mitchell set a new record for points by a shooting guard in the team's first two postseason games with 55 points, breaking Michael Jordan's record of 53 points. Mitchell led the Jazz to a 4-2 series win over the Thunder, averaging 28.5 points a game on 46.2 percent shooting. His 171 points in the series were the third-most ever by a rookie in his first six playoff games, behind only Kareem Abdul-Jabbar and Wilt Chamberlain. His 38 points in Game 6 (on 14-of-26 shooting) marked the highest scoring output by a rookie in a series-clinching win since 1980. On May 22, 2018, he was named to the NBA All-Rookie First Team.

Question: which rookie won before Donovan?
Answer: Zach LaVine.