How was Greg expressing concerns over AK's durability dragging him through the mud?
If he really said something to the effect of "I think AK is faking or milking injuries for some reason, probably because he's a sissy." then that is highly insulting. Even if he was a little more discrete with his language, saying you are skeptical of the severity of someone's injury TO THE PRESS is a diss or a call-out at absolute best.
Most importantly, I cannot find a purpose for it. The guy's a UFA, is it really important to get in some arbitrary parting shot? Because it's either that, or the FO is stupid enough to think this could hurt his market-value (it won't) and increase the chance they re-sign him for cheaper.