Spurs: 3 Ways Keldon Johnson must improve to become a star

Keldon's shooting must improve to help the Spurs
Much like most of the other young Spurs players, Keldon Johnson would be doing himself a big favor by improving on his shooting in the offseason. While his high-arcing threes in particular look quite nice, he only hit about 33% of them on 2.6 attempts per game this past season.
In an interview with ESPN San Antonio, Johnson specifically noted that he would like to improve both his ball-handling and shooting in the offseason, although he says that he wants to focus on his midrange game in particular. While ESPN's Rob Thompson suggests that Keldon works on his three-point shot instead, I don't think that working on his mid-range game is a particularly bad place to start.
Other than obviously DeMar DeRozan, Dejounte Murray is the Spurs' most prolific midrange shooter at this point, and is actually not far behind DeRozan in terms of efficiency. Lonnie Walker and Devin Vassell also show some signs that they have the potential to develop a reliable mid-range game, but in my eyes, they are definitely closer to being perimeter catch-and-shooters for the time being.
With that in mind, and given the possibility that DeMar has already played his last game with the Spurs, the team could use another player that's comfortable with pulling up in the midrange in late-game situations. While Keldon should obviously continue working on his three-point shooting as well, I'll be looking for more substantial improvements from Lonnie and Devin in that department next season.
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The possibilities also remain that the Spurs decide to draft a sharpshooter this coming July or they pick up more perimeter shooters in the free-agent market. Regardless though, Keldon addressing his shooting both in the mid-range and from the three-point line earlier on in his career will only serve to help his game in the long run.