Physical for a sport? They don't piss test for that, unless the school specifically states it wants a piss test- they legally have to to tell you they are testing for the NIDA 5- if they don't tell you, you're not being tested.

No doctor would waste their money on sending out piss test for high school sports, and if they DID suspect you, then they'd probably send you to one of those shady outpatient piss centers.