The Impact released their oft-injured defender after he suffered yet another setback in the Canadian Championship in May.
The 31-year-old Colombian defender was the club's very first signing before joining MLS in 2012, but due to repeated injury issues he has seldom played.
After only appearing in 11 games for the Impact in his first two seasons, Rivas was surprisingly re-signed for the 2014 campaign and his injury problems persisted. In the club's first preseason scrimmage in February he suffered a right-thigh injury which had him sidelined for more than three months. After returning to action in May, against Toronto FC in the first leg of the Canadian Championship final, he was forced to come off after only two minutes of play.
Prior to his arrival in Montreal, Rivas' injury issues were well documented. He spent five seasons in Europe between 2007 and 2011 and rareily featured.
Rivas has returned to his native Colombia where he is contemplating retirement.
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