Ryan Braun participant of 2007 Major League Baseball season
Milwaukee Brewers (2007–2020)
2007: Rookie of the Year
The Brewers brought Braun to spring training in 2007.  Their regular third baseman Corey Koskie was suffering from post-concussion syndrome, and missed the entire year. In 11 spring training games, Braun tied for 10th in the majors in home runs (5), and second in RBIs (15).In 2007, Braun had what some sportswriters called one of the most dominant rookie seasons in baseball history. Called up on May 24 by the Brewers, he hit his first major league home run two nights later. Braun was voted the National League (NL) Rookie of the Month for June, ranking first in RBIs (21) and tied for first in home runs (6) among NL rookies that month. He also recorded a .716 slugging percentage and a .435 OBP. In July, Braun became the fastest in Brewer history to hit 10 major league home runs, doing so in his 38th game.  He hit his 15th home run in the 50th game of his career, and his 20th in his 64th game, making him the fastest to those milestones since Albert Pujols in 2001.  He was also the fastest to 20 homers in Brewers history. At month's end, he received his second consecutive NL Rookie of the Month Award, as well as his first NL Player of the Month  Award (making him the first player to have won both awards in the same month). He hit a league-leading 11 home runs, with 25 RBIs, while batting .345.In mid-August, Brewers manager Ned Yost moved Braun from third in the batting order to cleanup, switching him with Prince Fielder. The move was expected to allow Braun to steal more, as batting before Fielder was not conducive to him risking being thrown out on steal attempts. Additionally, successfully stealing a base would hypothetically allow opponents to intentionally walk Fielder and avoid pitching to him. At the end of the month, however, Yost reverted to his previous batting order.
On August 26, Braun hit his 25th home run in his 82nd game, quicker than any major leaguer since Mark McGwire in 1987.On September 9, the Brewers became the third team in major league history to start a game with three straight home runs, as Rickie Weeks, J. J. Hardy, and Braun homered in consecutive at bats.  Braun said, "That was pretty cool. I was never part of something like that before." Braun's home run in that game also broke the Brewers rookie record for home runs (28). Braun hit his 30th homer in his 94th game, a pace no player had set to start a career since McGwire hit 30 in 84 games during 1986 and 1987.Braun finished with an NL-leading .634 slugging percentage, a mark that set new all-time rookie and Brewers records. He was fifth in the league in at bats per home run (13.3) and OPS (1.004), tied for fifth in home runs (34), and eighth in batting average (.324) among hitters with at least 490 plate appearances. He led the Brewers in batting average and slugging percentage, and was second behind Fielder in home runs, runs (91), and RBIs (97), tied for second in triples (6), and third in OBP (.370) and steals (15), despite not having played in the first 48 games of the season. Braun obliterated the club rookie records of 28 home runs and 81 RBIs, set by Fielder in 2006.