Thornton, 26 in June, started 32 games for the Colts from 2013-2015. The former third-round pick was held back by injuries and had not seen regular season action since December 2015. The reason for his retirement is not immediately known, but it’s safe to assume that his recovery has not gone according to plan.
The former third round pick was slated to be one of the top guard backups for Atlanta this year, offering support to Andy Levitre and Ryan Schraeder. Now, the Falcons will look to 2016 sixth round pick Wes Schweitzer and 2017 fourth round pick as the top reserves at the position.
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