Related to the time period does not mean related (closely) to another war. Most of what I have read cleary states that Commonwealth was not involved with the TYW (exception being Sigismund privately orderning Lisowczycy to the aid of Habsburgs), and I have yet to see a single reference to Muscovy involvement in this war. I guess the discussion or lack of therefore may make an interesting paragraph (in the name section, perhaps?) but not in the lead.  Talk