He sure has. Payton actually has an option too. I was thinking maybe they went with Haseley since he can be optioned and they're just going to return him to AAA when Yoan returns, and perhaps if a need arises in the OF later in the month they'd go with Payton. In that case wouldn't make much sense to bring up Payton for 1 start or something over the next 4 games and then DFA on Monday. But nope.
Not that DFAing Payton is some loss; there is basically no chance he is in this org next season. I am sure he'd suck if given another big league chance. But as you said, why would a solid AAAA player sign with the Sox if they do nothing but earn a spot all season in AAA and still don't get the call in order to hoard guys on the 40 man that are certain to be removed in November? Hard to make it make sense.