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Richardson (concussion) was listed as a full practice participant Wednesday.

After being diagnosed with a concussion upon exiting the Colts' Week 2 win over the Texans, Richardson didn't practice last week before sitting out this past Sunday's overtime win over the Ravens. According to JJ Stankevitz of the Colts' official site, head coach Shane Steichen said Wednesday that Richardson hasn't yet cleared the NFL's five-step concussion protocol, but the signal-caller's return to a full session Wednesday has him trending toward being available Sunday against the Rams.

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