you'll most likely loose more gains in your strength then vert. If u play b-ball mon-wed-fri or 3 times a week then i dont think u will loose vert.

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Height: 5,9"
Weight: 141lbs/64kgs
Reach : 7,7"
Wing Span : 6,3"
Standing Vertical: 27 inches(last tested-May 1)
Running Vertical: 30 inches
Goal Standing Vertical: 45 inches
Goal Running Vertical: 50 inches
Position: PG, SG, SF
Program: VJB Novice Weighs + Stronglifts 5*5
Soccer-Basketball-Rugby