Bost attended Concord High School in Concord, North Carolina. As a senior in 2006–07, he averaged 17 points, 6.5 rebounds and five assists per game to help lead coach Andy Poplin's CHS team to the 3A state hoops crown. He was subsequently named the 2007 Male Athlete of the Year by the North Carolina High School Athletic Association and the Charlotte Observer newspaper. In conjunction with basketball, Bost helped the Spiders become the first 3A school in North Carolina history to claim state titles in both football and basketball during the same academic year. He passed for 2,958 yards and 25 touchdowns on 64-percent accuracy to direct coach E.Z. Smith's 13-3 Spiders to the 2006 Class 3A state football title.
Prep season
In 2007, Bost enrolled at Hargrave Military Academy in Chatham, Virginia for one prep season. In 2007–08, he averaged 18.5 points, 5.5 rebounds, 4.7 assists and 3.6 steals per game to help lead Hargrave Military to a perfect 29-0 record and the 2008 National Prep Championship title.
College career
In his freshman season at Mississippi State, he was named to the 2009 SEC All-Freshman team. In 36 games, he averaged 10.9 points, 3.6 rebounds, 4.3 assists and 1.4 steals per game. In his sophomore season, he was named to the 2010 All-SEC second team. In 36 games, he averaged 13.0 points, 4.4 rebounds, 5.2 assists and 1.3 steals in 34.9 minutes per game. In April 2010, he declared for the NBA draft. In September 2010, he was suspended for 14 games by the NCAA for failing to withdraw properly before the NBA draft's deadline in May and failing to maintain his academics in the spring semester and offseason. Following the suspension, Bost returned to the Bulldogs' line-up as team captain and went on to be named to the All-SEC second team for the second straight year. In 17 games, he averaged 15.3 points, 3.5 rebounds, 6.2 assists and 1.6 steals in 35.5 minutes per game. In his senior year, he was named to the All-SEC first team and the NABC Division I All-District 21 second team. In 33 games, he averaged 15.8 points, 3.3 rebounds, 5.5 assists and 2.0 steals in 36.3 minutes per game.
Professional career
2012–13 season
After going undrafted in the 2012 NBA draft, Bost joined the Portland Trail Blazers for the 2012 NBA Summer League. In August 2012, he signed a two-year deal with Budućnost Podgorica of Montenegro. After averaging 9.1 points, 3.3 rebounds, 2.2 assists and 1.1 steals per game in 2012–13, he parted ways with the club.
2013–14 season
On August 19, 2013, Bost signed with the Portland Trail Blazers. However, he was later waived by the Trail Blazers on October 22, 2013. In November 2013, he was acquired by the Idaho Stampede as an affiliate player. On February 13, 2014, Bost was named to the Prospects All-Star team for the 2014 NBA D-League All-Star Game, as a replacement for Jarvis Varnado. On April 21, 2014, he signed with Trotamundos de Carabobo for the 2014 LPB season.
2014–15 season
In July 2014, Bost joined the Indiana Pacers for the 2014 NBA Summer League. On August 15, 2014, he signed with the Utah Jazz. However, he was later waived by the Jazz on October 10, 2014. On October 24, 2014, he signed with Trabzonspor of Turkey for the 2014–15 season.
2015–16 season
On August 7, 2015, Bost signed with Stelmet Zielona Góra of Poland for the 2015–16 season.
On July 1, 2017, Bost signed with Lithuanian club Žalgiris Kaunas. On December 11, 2017, he parted ways with Žalgiris after averaging 6 points per game in LKL and 2 points per game in EuroLeague. The next day, he signed with French club SIG Strasbourg. On July 12, 2018, Bost signed with BC Khimki a one-year contract. On February 27, 2019, Bost was officially released by the Russian team after having averages of 7,9 points and 2 assists in the Euroleague, and 8 points and 3,6 assists in the VTB United League. On the same day, it was announced that Bost has returned to AS Monaco.
