The Texans turned to a group of young backs Saturday night, but looked at some old ones Monday.
The Chargers let Brown walk as a free agent this offseason, and the 32-year-old also worked for the Patriots earlier this offseason.
The 30-year-old Leonard was solid last year for the Buccaneers, and has shown to be a veratile run-pass player. Powell has spent time with the Cardinals and Eagles.
The Texans have been without Arian Foster (hamstring), and they didn’t give free agent acquisition Andre Brown much work in the preseason opener, going with Jonathan Grimes, Alfred Blue and Dennis Johnson.