"The argument from both sides is the same," Visnovsky's agent, Neil Sheehy, told the Post. "The argument from the league was that the CBA is very clear, and the case for the NHLPA is that the CBA is very clear."
Visnovsky is arguing that his no-trade clause, that was included in his contract when he was playing in Edmonton, was still in effect after he was dealt from the Oilers to the Ducks in 2010.
The defenseman also insists that he was not informed of the plans of Ducks GM Bob Murray before the trade sent him to the Isles during the 2012 Draft for second-round pick in 2013.
"To me, it's really 50/50," Sheeny said. "It's something that has to be interpreted."
While Visnovsky says he would embrace his new destination, he still wants clarification on the confusing clause.
However, if the arbitrator chooses to rule in the NHLPA and Visnovsky's favor, the blueliner would be forced to return to Anaheim, where he could demand a trade after having felt betrayed earlier this summer.
In 68 games with the Ducks last season, Visnovsky collected six goals and 21 assists for 27 points.