Ervin attended Leroy High School in Leroy, Alabama, and played for the school's football, basketball and baseball teams. As a football player, Ervin played wide receiver alongside future NFL player Sammie Coates. During his junior season of football he hauled in 41 receptions for 697 yards and 6 touchdowns. In his senior football season at Leroy, Ervin tore the anterior cruciate ligament in his knee, requiring surgery. He missed the remainder of the football season, and missed all but the final six games of the baseball season. He played in the baseball postseason. He was able to pitch, but played as a designated hitter instead of an outfield, as he did not have the mobility to play the outfield. Samford University was the only National Collegiate Athletic AssociationDivision I university to offer Ervin a scholarship. Samford allowed Ervin to play as an outfielder and pitcher in college baseball for the Samford Bulldogs baseball team. As a freshman at Samford University in 2011, Ervin had a.371 batting average, a.440 on-base percentage, and a.516 SLG, with four home runs. He was named a freshman All-American by National Collegiate Baseball Writers Association and Louisville Slugger and the Southern Conference All-Freshman team and 1st Team All-SoCon. The Bulldogs also set a school single season record with 37 wins. Following his freshman season at Samford, Ervin played collegiate summer baseball for the Green Bay Bullfrogs of the Northwoods League, where he batted 39-for-128 with six home runs and 34 RBIs. As a sophomore in 2012, Ervin batted.327 with a.519 SLG, 10 home runs, and 52 RBIs. He was again named first team All-SoCon. Ervin and the Bulldogs broke the school record for wins yet again with 41 and earned their first berth in the NCAA Division I Baseball Tournament in school history. That summer, Ervin played collegiate summer baseball for the Harwich Mariners of the Cape Cod Baseball League. He was named the league's most valuable player after batting.331 with 31 RBIs and 29 runs scored. In the 2013 season as a junior, Ervin lead the Bulldogs in runs scored, stolen bases and on-base percentage. He was named the preseason SoCon Player of the Year and preseason first team All-American by Baseball America. Following the season, Ervin was named a Perfect Game Second Team All-American and a Third Team All-American by Baseball America.
Professional career
Draft and minor leagues
After the New York Yankees selected pitcher Eric Jagielo with the twenty-sixth overall selection, the Cincinnati Reds chose Ervin with the twenty-seventh pick of the 2013 Major League Baseball draft. This choice was surprising as the Reds were expected to select a pitcher. The Reds signed Ervin to a contract with a $1,812,400 signing bonus. Ervin began his professional career with the Billings Mustangs of the Rookie-levelPioneer League, where he batted.326 with eight home runs. He was promoted to the Dayton Dragons of the Class AMidwest League on July 30. He hit.349 with a home run for Dayton. He had a combined.311 batting average, nine home runs, 35 runs batted in, a.425 on-base percentage, and 14 stolen bases in 15 attempts. He injured his wrist during the 2013 season, and underwent surgery during the offseason to correct it. Ervin returned to Dayton in 2014, but struggled, batting.237 for the season, though he did steal 30 bases. Ervin worked with Eric Davis on his hitting in 2015. He started the 2015 season with the Daytona Tortugas of the Class A-AdvancedFlorida State League. Ervin's hitting improved, and he was selected for the FSL all-star game. He was promoted to the Pensacola Blue Wahoos of the Class AASouthern League later in the season. After the regular season, he played for the Peoria Javelinas of the Arizona Fall League. Ervin spent the 2016 season with Pensacola. He was named the league's player of the week for April 25 – April 30. In the league's all-star game, he hit a grand slam and won "Top Star" honors. Though he batted.239 for the season, his 36 stolen bases were fourth-best in the league. 362 on-base percentage was seventh-best in the league, and his 13 home runs were tied for eighth-best. The Reds added Ervin to their 40-man roster after the 2016 season.
Cincinnati Reds
2017 season
He began the 2017 season with the Louisville Bats of the Class AAAInternational League, and was promoted to the major leagues on April 21. Ervin made his major league debut on April 22 as a pinch hitter, in which he hit a tapper to pitcher Jake Arrieta who took the force out at second, allowing Ervin to reach on a fielder's choice. He was optioned back to Louisville on April 26. Ervin hit.256 with 7 home runs and 40 RBIs for the Bats. On August 15, he was recalled by the Reds. On August 16, 2017, Ervin recorded his first major league hit, a solo home run off of Héctor Rondón. The next day, he made his first career start at Wrigley Field, going 3-for-4 with a home run and 4 RBIs. In 28 games of his first season in the Majors, Ervin batted.259 with 3 home runs, 2 doubles, and 10 RBIs.
2018 season
To begin 2018, Ervin won a roster spot as the Reds' fifth outfielder on Opening Day. On April 26, he was optioned back to Louisville. Ervin had a brief 3 day call up with the Reds in June before returning to Louisville again on June 24. On July 20, Ervin was called up to replace an injured Scott Schebler. On August 17, 2018, he recorded his first career walk off hit with a walk off home run off Ray Black of the San Francisco Giants. Ervin finished the regular season with a.252 average, 7 home runs, and 31 RBIs
2019 season
Unlike 2018, Ervin did not making the club's Opening Day roster. He got his first of many call-ups of the year on April 23, 2019 to replace Matt Kemp who recently hit the DL. Despite not receiving much regular playing time with the big league club, Ervin enjoyed a career best year. He slashed career bests.271/.331/.466 and set career highs in GP, XBH, and R.
