Early life

Smart is the son of Camellia Smart and Billy Frank Smart. He has three older brothers: Todd Westbrook (deceased), Jeff Westbrook, and Michael Smart. He attended Edward S. Marcus High School in Flower Mound, Texas, along with one of his former Oklahoma State teammates, Phillip Forte. During his senior year, Smart averaged 15.1 points, 9.2 rebounds and 5 assists. In his high school career, he achieved a record of 115-6 through three seasons and was a two-time 5A state champion. He was also named a McDonald's All-American and was an ESPNHS first team All-American. Smart played competitive football until the sixth grade and enjoys playing tennis in his spare time.

Considered a five-star recruit by ESPN.com, Smart was listed as the No. 1 shooting guard and the No. 10 player in the nation in 2012.

College career

During his freshman year at Oklahoma State, Smart led the Cowboys to a 24-8 record and finished third place in the Big 12 behind Kansas and Kansas State. Smart averaged 15.4 points, 5.8 rebounds, and 4.2 assists per game and led the Big 12 in steals where he recorded 99 and averaged 3.0 per game. Smart and the Cowboys earned a trip to the NCAA bracket that year clinching a #5 seed in the Midwest Region. During the first round of the tournament though, the Cowboys were eliminated by the #12 seed Oregon. On April 17, 2013, Smart held a press conference in the student union at OSU and announced that he would not declare for the NBA draft and instead, return to OSU for his sophomore season. During that same press conference, Le'Bryan Nash and Markel Brown also announced that they would return to OSU for the 2013-14 season. On November 19, 2013 Smart tied an OSU single game scoring record with 39 points leading his #7 Oklahoma State Cowboys past #11 Memphis.

On February 8, 2014, at a game at Texas Tech, Smart shoved a fan in the stands after a verbal altercation in the closing minutes of the game, and received a technical foul following it. It had been previously reported that Smart told his coaches that the fan used a racial slur after Smart crashed into the stands. At a press conference the following afternoon, neither Smart nor coach Travis Ford addressed the question of what the fan said, and OSU announced that Smart would be suspended for three games because of the incident. Separately, Texas Tech announced its finding that the fan had not used a racial slur but had spoken inappropriately to Smart, and that the fan had agreed not to attend any further Texas Tech games during the 2013-14 season.

On February 13, 2014, he was named one of the 30 finalists for Naismith College Player of the Year. In the first game of the 2014 NCAA tournament, the Cowboys lost to Gonzaga. He finished with 23 points, 13 rebounds, 7 assists and 6 steals, becoming the first player in tournament history to record 20 points, 10 rebounds, 5 assists and 5 steals.

On April 7, 2014, Smart declared for the NBA draft, foregoing his final two years of college eligibility.

College statistics

Year	Team	GP	GS	MPG	FG%	3P%	FT%	RPG	APG	SPG	BPG	PPG
2012-13	Oklahoma State	33	32	33.5	.404	.290	.777	5.8	4.2	3.0	.7	15.4
2013-14	Oklahoma State	31	31	32.7	.422	.299	.728	5.9	4.8	2.9	.6	18.0
Career		64	63	33.1	.413	.295	.751	5.9	4.5	2.9	.6	16.6

Professional career

Boston Celtics (2014-present)

On June 26, 2014, Smart was selected with the sixth overall pick in the 2014 NBA draft by the Boston Celtics. He joined the Celtics for the 2014 NBA Summer League, and signed with the team on July 10.

In just his fifth NBA game, Smart sprained his left ankle in the Celtics' 101-98 win over the Indiana Pacers on November 7. He underwent an MRI following the game and was ruled out for two to three weeks. After missing ten games with the injury, Smart returned to action on December 3 against the Detroit Pistons. On December 4, he was assigned to the Maine Red Claws of the NBA Development League. He was recalled the next day after playing in Maine's win over the Erie BayHawks. On March 18, 2015, he scored a season-high 25 points in a loss to the Oklahoma City Thunder. On March 21, he was suspended for one game without pay for hitting San Antonio Spurs forward Matt Bonner in the groin the previous night. On May 18, Smart was named to the NBA's All-Rookie Second Team, garnering 142 points in the voting process.

On July 16, 2015, while playing for the Celtics at the 2015 Las Vegas Summer League, Smart dislocated two fingers on his right hand. On November 15, 2015, he scored a career-high 26 points in a 100-85 win over the Oklahoma City Thunder. Between November 22 and December 26, Smart missed 18 games with a lower left leg injury. He returned to action on December 27 against the New York Knicks, scoring six points in 13 minutes off the bench. On January 15, 2016, in a win over the Phoenix Suns, Smart recorded his first career triple-double with 10 points, 11 assists and 11 rebounds, becoming the first Celtics player to record a triple-double off the bench since Art Williams did so in 1971. On January 31, he tied his career high of 26 points in a loss to the Orlando Magic.

NBA career statistics

Legend
GP	Games played	GS	Games started	MPG	Minutes per game
FG%	Field goal percentage	3P%	3-point field goal percentage	FT%	Free throw percentage
RPG	Rebounds per game	APG	Assists per game	SPG	Steals per game
BPG	Blocks per game	PPG	Points per game	Bold	Career high

Regular season

Year	Team	GP	GS	MPG	FG%	3P%	FT%	RPG	APG	SPG	BPG	PPG
2014-15	Boston	67	38	27.0	.367	.335	.646	3.3	3.1	1.5	.3	7.8
2015-16	Boston	61	10	27.3	.348	.253	.777	4.2	3.0	1.5	.3	9.1
Career		128	48	27.1	.357	.296	.720	3.7	3.1	1.5	.3	8.4

Playoffs

Year	Team	GP	GS	MPG	FG%	3P%	FT%	RPG	APG	SPG	BPG	PPG
2015	Boston	4	3	22.5	.483	.231	.533	2.8	1.3	0.3	0.3	9.8
2016	Boston	6	1	32.2	.367	.344	.810	4.5	3.0	1.7	0.8	12.0
Career		10	4	28.3	.404	.311	.694	3.8	2.3	1.1	0.6	11.1

[ Source: Wikipedia ]