First off divorce is a BAD situation to be in, especially if there are kids or step kids involved. Believe me I was in a nasty, nasty one four years ago. Thank god for my second wife!
Because of family connection between JT and Zach there will always be at least subtle tension more so at the situation than at a personal level; man vs. man. Even if the divorce is civil and goes well it is what it is; sis breaking up with a dude I see everyday at work / my ex's bro is playing beside me.
But one thing: PROFESSIONALISM. Both men have exuded nothing but. I say this scenario will not hurt team chemistry. Its up to them to keep it professional and there is confidence with yours truly that they will.