INDIANAPOLIS -- Indianapolis Colts running back Robert Turbin has been suspended for using performance enhancing drugs, he announced via Twitter on Friday.
Turbin will be suspended for four games, a source told ESPN NFL Insider Adam Schefter. He will be eligible to return for the Week 5 game at New England on Oct. 4.
"A urine sample I provided to the NFL has resulted in a positive test of a banned substance under league policy with regards to Performance Enhancing Substances. It absolutely kills me that I allowed this to happen," Turbin wrote on Twitter.