The Reds are set to take on the undefeated Crew in Ohio but will be without captain Caldwell who has been suspended for one match.
That decision has left head coach Ryan Nelsen scratching his head as the referee never penalised the incident which was only picked up by the MLS disciplinary committee this week.
"I don't know why the league needs to get involved to tell you the truth," Nelsen said of Caldwell's suspension.
"You start to undermine your referees if you do this. Once you start undermining your referees and overturning decisions they've made then it starts becoming slippery slope."
Toronto currently sits fourth on the Eastern Conference table with two wins and a loss from their three outings. They will be missing star striker Jermain Defoe (hamstring) and Caldwell while attacking midfielder Jonathan Osorio and centre-back Doneil Henry are in doubt with various niggles.
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