Jarrett Allen adds muscle, a mentor and a three-point shot

Jarrett Allen remains the same. His afro is freshly shaped up and his attitude seems as nonchalant as ever.

As calm and cool as Allen looks and acts, there’s little doubt that his growth is one of the main focal points for the Nets this season. He sits at a small round table, one that is too small for his and its and uown good. It doesn’t matter. He fields questions and replies with short, but honest answers.

“What do the rookies look like,” a reporter (NI) asks. Allen answers, “Rookies ... like I did last year.”

Yup, still the same.

Only, his game is expected to evolve specifically in two areas: Strength and rebounding. The two go hand-in-hand and just judging from media day, he’s certainly…