After an up-and-down rookie season, Smart followed up with much of the same in 2015-16. The former lottery pick struggled mightily as a shooter, converting just 34.8 percent of his attempts from the field and a horrific 25.3 percent from three-point land. Even so, his tenacious defense and relentless attacking ability kept him firmly in coach Brad Stevens' deep rotation, when healthy. Smart missed 21 games, including 18 in a row from Nov. 22 to Dec. 27 while recovering from a lower-leg injury, but played in the Celtics' final 52 contests. Smart began the year as a starter but played exclusively off the bench after returning from injury. His role wasn't greatly impacted, however, as he saw at least 20 minutes in every game after Dec. 31. The 22-year-old remains a foundational piece in a still-developing Celtics backcourt, but he simply must improve his shooting efficiency to mount a serious challenge to Avery Bradley for the starting shooting guard spot. With Evan Turner now in Portland, Smart projects to serve as the Celtics' versatile sixth man, vacillating between both guard spots depending on need.

As a rookie in 2014-15, Smart struggled through Achilles and ankle injuries to play in 67 games, averaging 7.8 points, 3.1 assists, 1.5 steals, and 1.4 three-pointers per game. When available, Smart and Avery Bradley made for a lethal defensive backcourt, giving head coach Brad Stevens lots of opportunities to frustrate opponents, but Smart struggled offensively, shooting only 37 percent from the field, 34 percent from three land, and 65 percent from the free-throw line. The Celtics would clearly like to improve on Smart's 27 minutes per game, but that will be difficult with 2015 first-round picks Terry Rozier and R. J. Hunter also needing backcourt minutes to develop. Plus, the C's desperately need Isaiah Thomas' scoring. Evan Turner also proved last year that he can play both backcourt positions. Smart's aggressive defensive style leads to injuries, as demonstrated by the two fingers he dislocated during the Las Vegas Summer League. GM Danny Ainge's constant collecting of assets will eventually result in a trade that will shuffle the roster, which could further improve Smart's opportunities to play. Smart, the sixth pick of the 2014 draft, clearly has loads of potential. But there are too many obstacles in his path to predict a breakout sophomore season.

Smart is viewed as a combo guard with a primary focus as a point guard. If the Celtics drafted him to be a shooting guard, he'll need to improve in one significant area – his shooting. The sixth-overall pick in the draft shot just 29 percent during the summer league. While he managed to make 42 percent of his shots at Oklahoma State, much of that was due to Smart's ability to get to the rim. He made just 28 percent of his jump shots in the half-court offense. Smart is well-built and uses his body to create opportunities for himself, particularly on the drive. He averaged more than eight free-throw attempts per game for the Cowboys last season. Smart's also considered one of the top perimeter defenders coming out of college this year, a trait that pleases coach Brad Stevens. The coach has talked about establishing a "defensive DNA" for his team, and Smart fits that profile. He now joins a Celtics team that's got an elite point guard in Rajon Rondo and just signed its shooting guard, Avery Bradley, to a four-year contract. Initially, it looks like Smart will back up both guard spots. However, there's potential for an increased role later in the season, particularly if Boston trades Rondo, who is in the final year of his contract before hitting unrestricted free agency.