Things started to change for Richardson against Cincinnati on Oct. 19, when he suffered a hamstring injury and had to sit out the fourth quarter after rushing for 77 yards through the first three.
That's when Richardson's weight issue started to take off. He began the season at 225 pounds, but his weight had ballooned up to around 240 pounds later in the season, according to a source.
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He had shared carries with Ahmad Bradshaw during the first 10 games of the season, but Bradshaw suffered a fractured fibula -- ending his season -- against New England on Nov. 16.
The Colts, according to a source, became frustrated with Richardson because they couldn't get in touch with him and didn't have any communication with him until around 1 p.m. the day after the Patriots game.
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Where Richardson stood with the Colts became even more evident when he was listed as the third running back behind Herron and Zurlon Tipton for the wild-card playoff game against Cincinnati and then was inactive against Denver in the divisional round.
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Richardson then was suspended for the AFC Championship Game because he didn't alert the team he would not be at the walk-through due to a family emergency. He told the team, according to a source, that he didn't call or text because he had phone problems.
Richardson told ESPN.com on the day of the AFC Championship Game that he was "dealing with a very serious family emergency. ... I wouldn't purposely just miss walk-through."
General manager Ryan Grigson declined comment...