exactly, you have to factor in the opportunity cost of his replacement/s.
To get an established replacement would cost $5M+, if you want minimum wage guys the situation could turn into a merry go round like LF and 2B were in 2015/16. Remember Matt Joyce, Daniel Robertson, David De Jesus, Colin Cowgill, Shane Victorino, David Murphy, Kirk Nieuwenhius, Alfredo Marte, Craig Gentry, Daniel Nava, Ji Man Choi? That's just LF from 2015/16.
People said blah blah, we'll compete one of them will win the job and that will be that. It was a terrible situation, Calhoun is only 30 and his potential upside and ability to rebound * chance it happens is by the FO's calculation higher than the chance a bunch of $500K career journeymen's suddenly start hitting once called up.
If there was a perfect scenario to replace him like Adell/Marsh being at least at AA knocking on the door, maybe you DFA Young, call one of them up, and see what happens in a month or two w/ them sharing time to start.
But as it is, Calhoun will probably be out there until at least the deadline, where they might snag a rental to finish out the year/playoffs if this continues.