text: Sep. 21, 2017 Updated: Sep. 21, 2017 5 p.m.
  1of30Chris Johnson, who will sign with the Rockets, in action with the 76ers in 2014.
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  The Rockets will sign former Rio Grande Valley Vipers standout Chris Johnson to a one-year contract on Friday, a person with knowledge of the deal said Thursday.
  Johnson, a 6-foot-6 forward who has played briefly with the Grizzlies, 76ers, Jazz and Bucks, had a strong showing with the Rockets' summer league team in Las Vegas this season. In four seasons with the Vipers, he averaged 14.6 points on 48.2 percent shooting and 5.5 rebounds.
  With Johnson and the pending signing of free agent guard Bobby Brown, the Rockets will have the maximum of 20 players available for the start of training camp on Tuesday.
  Forward Isaiah Hartenstein, the Rockets' second-round pick last June, will sign with the Vipers of the G League, according to a person with knowledge of the deal.