Sampson tweeted a challenge to all amateur-team coaches to donate school gear — shirts, shoes and the like.

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Among the responses:

Even non-basketball programs have pitched in.

Sampson’s challenge is part of a strong response by Houston sports teams, pro and college, in response to Harvey, a deadly storm that has also caused massive flooding and property damage. The owners of the Texans, Astros and Rockets have pledged millions of dollars toward relief efforts.