Khristopher Adrian Davis (born December 21, 1987) is an American professional baseball left fielder for the Oakland Athletics of Major League Baseball (MLB). He previously played for the Milwaukee Brewers .
Davis was born in Lakewood, California .  He played baseball at Deer Valley High School in Glendale, Arizona , where he was twice named an All-State player.  During his senior season at Deer Valley, Davis hit .592 with ten home runs and 50 RBIs to lead the team to a state title.  Davis attended California State University, Fullerton , where he played college baseball for the Cal State Fullerton Titans .  Davis excelled for Cal State as an outfielder , designated hitter , and pinch hitter .  In his junior season, Davis hit .328 with 16 home runs and 58 RBIs. 
In 2006 Davis was first drafted by the Washington Nationals in the 29th round; he did not sign with the team but opted to play college baseball.  He later was drafted by the Milwaukee Brewers in the seventh round of the 2009 Major League Baseball Draft . 
Davis began his minor league career in 2009. He played in one game for the Helena Brewers Rookie League club and ten games for the Arizona League Brewers ; Davis combined for 2 home runs and a .237 batting average.  He spent the entire 2010 season playing for the Wisconsin Timber Rattlers in mid Single A level ball. He played in 128 games with 22 home runs and a .280 batting average. 
To start the 2011 season, Davis was promoted to the advanced level Single A Brevard County Manatees .  After 90 games, he was sent to the AA level with the Huntsville Stars ; Davis played 35 games with the team.  In 125 games that year, he batted .280 with 84 RBI and 17 home runs. 
In 2012, Davis returned to the Arizona League Brewers and the Hunstville Stars for six and 44 games respectively.  The Milwaukee Brewers promoted Davis to their top level below the Major Leagues with the AAA Nashville Sounds of the Pacific Coast League .  He played in 32 games for the Sounds with a .310 batting average. 
The Brewers added Davis to their 40-man roster during the 2012–13 offseason.  After a productive spring training,  Davis made the final roster cut and made his major league debut on opening day, grounding out in a pinch-hit appearance. Five days later, Davis made his first major league start in left field and recorded his first major league hit, a double off Patrick Corbin of the Arizona Diamondbacks . After a poor start that saw him bat just .188, Davis was optioned to Nashville.
Davis was recalled in mid-July, and after Ryan Braun 's suspension due to performance-enhancing drug use, became the Brewers' starting left fielder down the stretch. He hit his first major league home run at Miller Park on July 23 off Colt Hynes of the San Diego Padres . Davis ended the year with 11 home runs in 136 at-bats, with a slugging percentage of .596.
Davis' rookie performance was enough to encourage Brewers management to trade right fielder Norichika Aoki to Kansas City and move Ryan Braun to from left to right field, opening up an everyday role for Davis. After a slow start, batting .219 with an on-base percentage of .250 and a slugging percentage of.388 through May 20, Davis hit four home runs in six games. At the All-Star Break , Davis led the Brewers with 15 home runs. In 144 games for the Brewers, Davis hit .244 with 22 home runs and 69 RBI. 
Davis was once again named the starting left fielder for the Brewers during the 2015 season and batted .247 with 27 home runs and 66 RBI in 121 games.
On February 12, 2016, the Brewers traded Davis to the Oakland Athletics for Jacob Nottingham and Bubba Derby.  On May 17 in a game against the Texas Rangers , Davis hit 3 home runs, including a walk-off grand slam for the third. This was only the second time this has happened in MLB history.  On August 14, 2016, Davis hit his 30th home run of the season, a two-run homer against the Seattle Mariners . On September 18, 2016, Davis hit his 39th and 40th home runs of the season in a game against the Rangers. He added two more homers to conclude the season. He also contributed 102 RBI for the season, becoming the first player in the franchise to hit 100 or more RBIs since the 2006 season, when Frank Thomas had 114 RBIs for the Athletics.
Mexico national team
Davis was invited by Bobby Magallanes  to play for the Mexican team . He planned to represent the country of his mother's birth in the 2017 edition of the World Baseball Classic , but he did not play in the tournament.
Davis' father, Rodney, played in the Los Angeles Dodgers organization and has served as a scout for the Dodgers and Arizona Diamondbacks .  His mother, Sonia Davis (née Alarcón),  was born in Culiacan, Sinaloa , but grew up in Ensenada .