It's not even training camp but Spurs already have a Keldon Johnson problem

Keldon Johnson | Daniel Dunn-Imagn ImagesSan Antonio Spurs forward Keldon Johnson is their longest-tenured player, but there is already a problem brewing ahead of training camp.

San Antonio Spurs long-stay Keldon Johnson has developed a strong bond with fans with his energetic play and physical style. Even so, his future with the Spurs is far from settled.

The Spurs are clearly trying to make the playoffs next season, and while they have gotten far better, their biggest flaw, shooting, could hurt those chances. As a result, they may have to make tough rotation decisions to maximize their chances of winning, primarily whether to play Johnson.

Despite his importance to the Spurs, it's difficult…